## 5.4.2

No user-facing changes.

## 5.4.1

### Minor Analysis Improvements

* Improved stability when downloading .NET versions by setting appropriate environment variables for `dotnet` commands. The correct architecture-specific version of .NET is now downloaded on ARM runners.
* Compilation errors are now included in the debug log when using build-mode none.
* Added a new extractor option to specify a custom directory for dependency downloads in buildless mode. Use `-O buildless_dependency_dir=<path>` to configure the target directory.

## 5.4.0

### Deprecated APIs

* `ControlFlowElement.controlsBlock` has been deprecated in favor of the Guards library.

### New Features

* Initial support for incremental C# databases via `codeql database create --overlay-base`/`--overlay-changes`.

### Minor Analysis Improvements

* Updated *roslyn* and *binlog* dependencies in the extractor, which may improve database and analysis quality.

## 5.3.0

### Deprecated APIs

* The class `AbstractValue` in the `Guards` library has been deprecated and replaced with the class `GuardValue`.

### Major Analysis Improvements

* The representation of the C# control-flow graph has been significantly changed. This has minor effects on a wide range of queries including both minor improvements and minor regressions. For example, improved precision has been observed for `cs/inefficient-containskey` and `cs/stringbuilder-creation-in-loop`. Two queries stand out as being significantly affected with great improvements: `cs/dereferenced-value-may-be-null` has been completely rewritten which removes a very significant number of false positives. Furthermore, `cs/constant-condition` has been updated to report many new results - these new results are primarily expected to be true positives, but a few new false positives are expected as well. As part of these changes, `cs/dereferenced-value-may-be-null` has been changed from a `path-problem` query to a `problem` query, so paths are no longer reported for this query.

### Minor Analysis Improvements

* Added tracer support for macOS and Linux when the .NET CLI (`dotnet`) directly invokes the C# compiler (`csc`). This enhancement provides basic tracing and extraction capabilities for .NET 10 RC2 on these platforms.
* The extraction of location information for source code entities has been updated to use star IDs (`*` IDs). This change should be transparent to end-users but may improve extraction performance in some cases by reducing TRAP file size and eliminating overhead from location de-duplication.

## 5.2.6

### Minor Analysis Improvements

* The extraction of location information for parameters, fields, constructors, destructors and user operators has been optimized. Previously, location information was extracted multiple times for each bound generic. Now, only the location of the unbound generic declaration is extracted during the extraction phase, and the QL library explicitly reuses this location for all bound instances of the same generic.
* The extraction of location information for type parameters and tuples types has been optimized. Previously, location information was extracted multiple times for each type when it was declared across multiple files. Now, the extraction context is respected during the extraction phase, ensuring locations are only extracted within the appropriate context. This change should be transparent to end-users but may improve extraction performance in some cases.
* The extraction of location information for named types (classes, structs, etc.) has been optimized. Previously, location information was extracted multiple times for each type when it was declared across multiple files. Now, the extraction context is respected during the extraction phase, ensuring locations are only extracted within the appropriate context. This change should be transparent to end-users but may improve extraction performance in some cases.
* The extraction of the location for bound generic entities (methods, accessors, indexers, properties, and events) has been optimized. Previously, location information was extracted multiple times for each bound generic. Now, only the location of the unbound generic declaration is extracted during the extraction phase, and the QL library explicitly reuses this location for all bound instances of the same generic.

## 5.2.5

No user-facing changes.

## 5.2.4

No user-facing changes.

## 5.2.3

### Minor Analysis Improvements

* A bug has been fixed in the data flow analysis, which means that flow through calls using the `base` qualifier may now be tracked more accurately.
* Added summary models for `System.Xml.XmlReader`, `System.Xml.XmlTextReader` and `System.Xml.XmlDictionaryReader`.
* Models-as-data summaries for byte and char arrays and pointers now treat the entire collection as tainted, reflecting their common use as string alternatives.
* The default taint tracking configuration now allows implicit reads from collections at sinks and in additional flow steps. This increases flow coverage for many taint tracking queries and helps reduce false negatives.

## 5.2.2

No user-facing changes.

## 5.2.1

No user-facing changes.

## 5.2.0

### New Features

* Added a new predicate, `getASuperType()`, to get a direct supertype of this type.

## 5.1.9

No user-facing changes.

## 5.1.8

No user-facing changes.

## 5.1.7

### Minor Analysis Improvements

* The generated Models as Data (MaD) models for .NET 9 Runtime have been updated and are now more precise (due to a recent model generator improvement).

## 5.1.6

No user-facing changes.

## 5.1.5

### Minor Analysis Improvements

* Improved autobuilder logic for detecting whether a project references a SDK (and should be built using `dotnet`).

## 5.1.4

### Minor Analysis Improvements

* The *alignment* and *format* clauses in string interpolation expressions are now extracted. That is, in `$"Hello {name,align:format}"` *name*, *align* and *format* are extracted as children of the string interpolation *insert* `{name,align:format}`.
* Blazor support can now better recognize when a property being set is specified with a string literal, rather than referenced in a `nameof` expression.

## 5.1.3

### Minor Analysis Improvements

* The models for `System.Uri` have been modified to better model the flow of tainted URIs.
* Modeled parameter passing between Blazor parent and child components.

## 5.1.2

No user-facing changes.

## 5.1.1

No user-facing changes.

## 5.1.0

### Deprecated APIs

* The predicates `immediatelyControls` and `controls` on the `ConditionBlock`
  class have been deprecated in favor of the newly added `dominatingEdge`
  predicate.

### Minor Analysis Improvements

* Full support for C# 13 / .NET 9. All new language features are now supported by the extractor. QL library and data flow support for the new C# 13 language constructs and generated MaD models for the .NET 9 runtime.
* C# 13: Add generated models for .NET 9.
* The models for `System.Net.Http.HttpRequestMessage` and `System.UriBuilder` have been modified to better model the flow of tainted URIs.
* Blazor `[Parameter]` fields bound to a variable from the route specified in the `@page` directive are now modeled as remote flow sources.

## 5.0.0

### Breaking Changes

* Deleted the deprecated `getInstanceType` predicate from the `UnboundGenericType` class.
* Deleted the deprecated `getElement` predicate from the `Node` class in `ControlFlowGraph.qll`, use `getAstNode` instead.

### Minor Analysis Improvements

* C# 13: Added MaD models for some overload implementations using `ReadOnlySpan` parameters (like `String.Format(System.String, System.ReadOnlySpan<System.Object>))`).
* C# 13: Added support for the overload resolution priority attribute (`OverloadResolutionPriority`). Usages of the attribute and the corresponding priority can be found using the QL class `SystemRuntimeCompilerServicesOverloadResolutionPriorityAttribute`.
* C# 13: Added support for partial properties and indexers.

## 4.0.2

### Minor Analysis Improvements

* Added extractor support for extracting implicit `ToString` calls in binary `+` expressions and string interpolation expressions.
* The Razor source generator invocation in `build-mode:none` extraction has been changed to use relative file paths instead of absolute ones.
* C# 13: Added extractor support and call dispatch logic (data flow) for the (negative) type parameter constraint `allows ref struct`. Added extractor support for the type parameter constraint `notnull`.

## 4.0.1

### Minor Analysis Improvements

* C# 13: Added QL library support for *collection* like type `params` parameters.
* Added `remote` flow source models for properties of Blazor components annotated with any of the following attributes from `Microsoft.AspNetCore.Components`:
  - `[SupplyParameterFromForm]`
  - `[SupplyParameterFromQuery]`
* Added the constructor and explicit cast operator of `Microsoft.AspNetCore.Components.MarkupString` as an `html-injection` sink. This will help catch cross-site scripting resulting from using `MarkupString`. 
* Added flow summaries for the `Microsoft.AspNetCore.Mvc.Controller::View` method.
* The data flow library has been updated to track types in a slightly different way: The type of the tainted data (which may be stored into fields, etc.) is tracked more precisely, while the types of intermediate containers for nested contents is tracked less precisely. This may have a slight effect on false positives for complex flow paths.
* The C# extractor now supports *basic* extraction of .NET 9 projects. There might be limited support for extraction of code using the new C# 13 language features.

## 4.0.0

### Breaking Changes

* Deleted the old deprecated data flow API that was based on extending a configuration class. See https://github.blog/changelog/2023-08-14-new-dataflow-api-for-writing-custom-codeql-queries for instructions on migrating your queries to use the new API.

### Minor Analysis Improvements

* Added support for data-flow through member accesses of objects with `dynamic` types.
* Only extract *public* and *protected* members from reference assemblies. This yields an approximate average speed-up of around 10% for extraction and query execution. Custom MaD rows using `Field`-based summaries may need to be changed to `SyntheticField`-based flows if they reference private fields.
* Added `Microsoft.AspNetCore.Components.NagivationManager::Uri` as a remote flow source, since this value may contain user-specified values.
* Added the following URI-parsing methods as summaries, as they may be tainted with user-specified values:
  - `System.Web.HttpUtility::ParseQueryString`
  - `Microsoft.AspNetCore.WebUtilities.QueryHelpers::ParseQuery`
  - `Microsoft.AspNetCore.WebUtilities.QueryHelpers::ParseNullableQuery`
* Added `js-interop` sinks for the `InvokeAsync` and `InvokeVoidAsync` methods of `Microsoft.JSInterop.IJSRuntime`, which can run arbitrary JavaScript. 

## 3.1.1

### Minor Analysis Improvements

* The Models as Data models for .NET 8 Runtime now include generated models for higher order methods.

## 3.1.0

### Major Analysis Improvements

* The generated .NET 8 runtime models have been updated.

## 3.0.1

No user-facing changes.

## 3.0.0

### Breaking Changes

* C#: Add support for MaD directly on properties and indexers using *attributes*. Using `Attribute.Getter` or `Attribute.Setter` in the model `ext` field applies the model to the getter or setter for properties and indexers. Prior to this change `Attribute` models unintentionally worked for property setters (if the property is decorated with the matching attribute). That is, a model that uses the `Attribute` feature directly on a property for a property setter needs to be changed to `Attribute.Setter`.
* C#: Remove all CIL tables and related QL library functionality.

### Deprecated APIs

* The class `ThreatModelFlowSource` has been renamed to `ActiveThreatModelSource` to more clearly reflect it only contains the currently active threat model sources. `ThreatModelFlowSource` has been marked as deprecated.

### Minor Analysis Improvements

* `DataFlow::Node` instances are no longer created for library methods and fields that are not callable (either statically or dynamically) or otherwise referred to from source code. This may affect third-party queries that use these nodes to identify library methods or fields that are present in DLL files where those methods or fields are unreferenced. If this presents a problem, consider using `Callable` and other non-dataflow classes to identify such library entities.
* C#: Add extractor support for attributes on indexers.

## 2.0.0

### Breaking Changes

* Deleted many deprecated taint-tracking configurations based on `TaintTracking::Configuration`. 
* Deleted many deprecated dataflow configurations based on `DataFlow::Configuration`. 
* Deleted the deprecated `explorationLimit` predicate from `DataFlow::Configuration`, use `FlowExploration<explorationLimit>` instead.

### Minor Analysis Improvements

* Parameters of public methods in abstract controller-like classes are now considered remote flow sources.
* The reported location of `partial` methods has been changed from the definition to the implementation part.

## 1.2.0

### New Features

* C# support for `build-mode: none` is now out of beta, and generally available.

## 1.1.0

### Major Analysis Improvements

* Added support for data flow through side-effects on static fields. For example, when a static field containing an array is updated.

### Minor Analysis Improvements

* Added some new `local` source models. Most prominently `System.IO.Path.GetTempPath` and `System.Environment.GetFolderPath`. This might produce more alerts, if the `local` threat model is enabled.
* The extractor has been changed to not skip source files that have already been seen. This has an impact on source files that are compiled multiple times in the build process. Source files with conditional compilation preprocessor directives (such as `#if`) are now extracted for each set of preprocessor symbols that are used during the build process.

## 1.0.5

No user-facing changes.

## 1.0.4

No user-facing changes.

## 1.0.3

No user-facing changes.

## 1.0.2

No user-facing changes.

## 1.0.1

No user-facing changes.

## 1.0.0

### Breaking Changes

* CodeQL package management is now generally available, and all GitHub-produced CodeQL packages have had their version numbers increased to 1.0.0.

## 0.10.1

No user-facing changes.

## 0.10.0

### Breaking Changes

* Deleted the deprecated `getAssemblyName` predicate from the `Operator` class. Use `getFunctionName` instead.
* Deleted the deprecated `LShiftOperator`, `RShiftOperator`, `AssignLShiftExpr`, `AssignRShiftExpr`, `LShiftExpr`, and `RShiftExpr` aliases.
* Deleted the deprecated `getCallableDescription` predicate from the `ExternalApiDataNode` class. Use `hasQualifiedName` instead.

### Minor Analysis Improvements

* Generated .NET Runtime models for properties with both getters and setters have been removed as this is now handled by the data flow library.

## 0.9.1

### Minor Analysis Improvements

* Extracting suppress nullable warning expressions did not work when applied directly to a method call (like `System.Console.Readline()!`). This has been fixed.

## 0.9.0

### Breaking Changes

* The CIL extractor has been deleted and the corresponding extractor option `cil` has been removed. It is no longer possible to do CIL extraction.
* The QL library C# classes no longer extend their corresponding `DotNet` classes. Furthermore, CIL related data flow functionality has been deleted and all `DotNet` and `CIL` related classes have been deprecated. This effectively means that it no longer has any effect to enable CIL extraction.

### Minor Analysis Improvements

* Added new source models for the `Dapper` package. These models can be enabled by enabling the `database` threat model.
* Additional models have been added for `System.IO`. These are primarily source models with the `file` threat model, and summaries related to reading from a file or stream.
* Support for C# 12 / .NET8.
* Added the `windows-registry` source kind and threat model to represent values which come from the registry on Windows.
* The models for `System.Net.Http.HttpRequestMessage` have been modified to better model the flow of tainted URIs.
* The .NET standard libraries APIs for accessing command line arguments and environment variables have been modeled using the `commandargs` and `environment` threat models.
* The `cs/assembly-path-injection` query has been modified so that it's sources rely on `ThreatModelFlowSource`. In order to restore results from command line arguments, you should enable the `commandargs` threat model.
* The models for `System.IO.TextReader` have been modified to better model the flow of tainted text from a `TextReader`.

## 0.8.12

No user-facing changes.

## 0.8.11

No user-facing changes.

## 0.8.10

### Major Analysis Improvements

* Improved support for flow through captured variables that properly adheres to inter-procedural control flow.
* We no longer make use of CodeQL database stats, which may affect join-orders in custom queries. It is therefore recommended to test performance of custom queries after upgrading to this version.

### Minor Analysis Improvements

* C# 12: Add QL library support (`ExperimentalAttribute`) for the experimental attribute.
* C# 12: Add extractor and QL library support for `ref readonly` parameters.
* C#: The table `expr_compiler_generated` has been deleted and its content has been added to `compiler_generated`.
* Data flow via get only properties like `public object Obj { get; }` is now captured by the data flow library.

## 0.8.9

### Minor Analysis Improvements

* C# 12: The QL and data flow library now support primary constructors.
* Added a new database relation to store key-value pairs corresponding to compilations. The new relation is used in
buildless mode to surface information related to dependency fetching.

## 0.8.8

### Minor Analysis Improvements

* Added a new database relation to store compiler arguments specified inside `@[...].rsp` file arguments. The arguments
are returned by `Compilation::getExpandedArgument/1` and `Compilation::getExpandedArguments/0`.
* C# 12: Added extractor, QL library and data flow support for collection expressions like `[1, y, 4, .. x]`.
* The C# extractor now accepts an extractor option `logging.verbosity` that specifies the verbosity of the logs. The
option is added via `codeql database create --language=csharp -Ologging.verbosity=debug ...` or by setting the
corresponding environment variable `CODEQL_EXTRACTOR_CSHARP_OPTION_LOGGING_VERBOSITY`.

## 0.8.7

### Minor Analysis Improvements

* Deleted many deprecated predicates and classes with uppercase `SSL`, `XML`, `URI`, `SSA` etc. in their names. Use the PascalCased versions instead.
* Deleted the deprecated `getALocalFlowSucc` predicate and `TaintType` class from the dataflow library.
* Deleted the deprecated `Newobj` and `Rethrow` classes, use `NewObj` and `ReThrow` instead.
* Deleted the deprecated `getAFirstRead`, `hasAdjacentReads`, `lastRefBeforeRedef`, and `hasLastInputRef` predicates from the SSA library.
* Deleted the deprecated `getAReachableRead` predicate from the `AssignableRead` and `VariableRead` classes.
* Deleted the deprecated `hasQualifiedName` predicate from the `NamedElement` class.
* C# 12: Add extractor support and QL library support for inline arrays.
* Fixed a Log forging false positive when logging the value of a nullable simple type. This fix also applies to all other queries that use the simple type sanitizer.
* The diagnostic query `cs/diagnostics/successfully-extracted-files`, and therefore the Code Scanning UI measure of scanned C# files, now considers any C# file seen during extraction, even one with some errors, to be extracted / scanned.
* Added a new library `semmle.code.csharp.security.dataflow.flowsources.FlowSources`, which provides a new class `ThreatModelFlowSource`. The `ThreatModelFlowSource` class can be used to include sources which match the current *threat model* configuration.
* A manual neutral summary model for a callable now blocks all generated summary models for that callable from having any effect.
* C# 12: Add extractor support for lambda expressions with parameter defaults like `(int x, int y = 1) => ...` and lambda expressions with a `param` parameter like `(params int[] x) => ...)`.

## 0.8.6

### Minor Analysis Improvements

* The `Call::getArgumentForParameter` predicate has been reworked to add support for arguments passed to `params` parameters.
* The dataflow models for the `System.Text.StringBuilder` class have been reworked. New summaries have been added for `Append` and `AppendLine`. With the changes, we expect queries that use taint tracking to find more results when interpolated strings or `StringBuilder` instances are passed to `Append` or `AppendLine`.
* Additional support for `Amazon.Lambda` SDK

## 0.8.5

No user-facing changes.

## 0.8.4

No user-facing changes.

## 0.8.3

### Minor Analysis Improvements

* The predicate `UnboundGeneric::getName` now prints the number of type parameters as a `` `N`` suffix, instead of a `<,...,>` suffix. For example, the unbound generic type
`System.Collections.Generic.IList<T>` is printed as ``IList`1`` instead of `IList<>`.
* The predicates `hasQualifiedName`, `getQualifiedName`, and `getQualifiedNameWithTypes` have been deprecated, and are instead replaced by `hasFullyQualifiedName`, `getFullyQualifiedName`, and `getFullyQualifiedNameWithTypes`, respectively. The new predicates use the same format for unbound generic types as mentioned above.
* These changes also affect models-as-data rows that refer to a field or a property belonging to a generic type. For example, instead of writing
```yml
extensions:
  - addsTo:
      pack: codeql/csharp-all
      extensible: summaryModel
      data:
        - ["System.Collections.Generic", "Dictionary<TKey,TValue>", False, "Add", "(System.Collections.Generic.KeyValuePair<TKey,TValue>)", "", "Argument[0].Property[System.Collections.Generic.KeyValuePair<,>.Key]", "Argument[this].Element.Property[System.Collections.Generic.KeyValuePair<,>.Key]", "value", "manual"]
```
one now writes
```yml
extensions:
  - addsTo:
      pack: codeql/csharp-all
      extensible: summaryModel
      data:
        - ["System.Collections.Generic", "Dictionary<TKey,TValue>", False, "Add", "(System.Collections.Generic.KeyValuePair<TKey,TValue>)", "", "Argument[0].Property[System.Collections.Generic.KeyValuePair`2.Key]", "Argument[this].Element.Property[System.Collections.Generic.KeyValuePair`2.Key]", "value", "manual"]
```
* The models-as-data format for types and methods with type parameters has been changed to include the names of the type parameters. For example, instead of writing
```yml
extensions:
  - addsTo:
      pack: codeql/csharp-all
      extensible: summaryModel
      data:
        - ["System.Collections.Generic", "IList<>", True, "Insert", "(System.Int32,T)", "", "Argument[1]", "Argument[this].Element", "value", "manual"]
        - ["System.Linq", "Enumerable", False, "Select<,>", "(System.Collections.Generic.IEnumerable<TSource>,System.Func<TSource,System.Int32,TResult>)", "", "Argument[0].Element", "Argument[1].Parameter[0]", "value", "manual"]
```
one now writes
```yml
extensions:
  - addsTo:
      pack: codeql/csharp-all
      extensible: summaryModel
      data:
        - ["System.Collections.Generic", "IList<T>", True, "Insert", "(System.Int32,T)", "", "Argument[1]", "Argument[this].Element", "value", "manual"]
        - ["System.Linq", "Enumerable", False, "Select<TSource,TResult>", "(System.Collections.Generic.IEnumerable<TSource>,System.Func<TSource,System.Int32,TResult>)", "", "Argument[0].Element", "Argument[1].Parameter[0]", "value", "manual"]
```

## 0.8.2

No user-facing changes.

## 0.8.1

### Minor Analysis Improvements

* Deleted the deprecated `isBarrierGuard` predicate from the dataflow library and its uses, use `isBarrier` and the `BarrierGuard` module instead.

## 0.8.0

No user-facing changes.

## 0.7.5

No user-facing changes.

## 0.7.4

### Minor Analysis Improvements

* The `--nostdlib` extractor option for the standalone extractor has been removed.

## 0.7.3

### Minor Analysis Improvements

* The query library for `cs/hardcoded-credentials` now excludes benign properties such as `UserNameClaimType` and `AllowedUserNameCharacters` from `Microsoft.AspNetCore.Identity` options classes.

## 0.7.2

No user-facing changes.

## 0.7.1

### New Features

* The `DataFlow::StateConfigSig` signature module has gained default implementations for `isBarrier/2` and `isAdditionalFlowStep/4`. 
  Hence it is no longer needed to provide `none()` implementations of these predicates if they are not needed.

### Minor Analysis Improvements

* Data flow configurations can now include a predicate `neverSkip(Node node)`
  in order to ensure inclusion of certain nodes in the path explanations. The
  predicate defaults to the end-points of the additional flow steps provided in
  the configuration, which means that such steps now always are visible by
  default in path explanations.

## 0.7.0

### Major Analysis Improvements

* The data flow library now performs type strengthening. This increases precision for all data flow queries by excluding paths that can be inferred to be impossible due to incompatible types.

### Minor Analysis Improvements

* Additional support for `command-injection`, `ldap-injection`, `log-injection`, and `url-redirection` sink kinds for Models as Data.

## 0.6.4

No user-facing changes.

## 0.6.3

### Major Analysis Improvements

* The extractor has been changed to run after the traced compiler call. This allows inspecting compiler generated files, such as the output of source generators. With this change, `.cshtml` files and their generated `.cshtml.g.cs` counterparts are extracted on dotnet 6 and above.

### Minor Analysis Improvements

* C#: Analysis of the `dotnet test` command supplied with a `dll` or `exe` file as argument no longer fails due to the addition of an erroneous `-p:SharedCompilation=false` argument.
* Deleted the deprecated `WebConfigXML`, `ConfigurationXMLElement`, `LocationXMLElement`, `SystemWebXMLElement`, `SystemWebServerXMLElement`, `CustomErrorsXMLElement`, and `HttpRuntimeXMLElement` classes from `WebConfig.qll`. The non-deprecated names with PascalCased Xml suffixes should be used instead.
* Deleted the deprecated `Record` class from both `Types.qll` and `Type.qll`.
* Deleted the deprecated `StructuralComparisonConfiguration` class from `StructuralComparison.qll`, use `sameGvn` instead.
* Deleted the deprecated `isParameterOf` predicate from the `ParameterNode` class.
* Deleted the deprecated `SafeExternalAPICallable`, `ExternalAPIDataNode`, `UntrustedDataToExternalAPIConfig`, `UntrustedExternalAPIDataNode`, and `ExternalAPIUsedWithUntrustedData` classes from `ExternalAPIsQuery.qll`. The non-deprecated names with PascalCased Api suffixes should be used instead.
* Updated the following C# sink kind names. Any custom data extensions that use these sink kinds will need to be updated accordingly in order to continue working.
  * `code` to `code-injection`
  * `sql` to `sql-injection`
  * `html` to `html-injection`
  * `xss` to `js-injection`
  * `remote` to `file-content-store`

## 0.6.2

### Minor Analysis Improvements

* The `cs/log-forging`, `cs/cleartext-storage`, and `cs/exposure-of-sensitive-information` queries now correctly handle unsanitized arguments to `ILogger` extension methods.
* Updated the `neutralModel` extensible predicate to include a `kind` column.

## 0.6.1

No user-facing changes.

## 0.6.0

### Deprecated APIs

* The recently introduced new data flow and taint tracking APIs have had a
  number of module and predicate renamings. The old APIs remain in place for
  now.

### Bug Fixes

* Fixed some accidental predicate visibility in the backwards-compatible wrapper for data flow configurations. In particular `DataFlow::hasFlowPath`, `DataFlow::hasFlow`, `DataFlow::hasFlowTo`, and `DataFlow::hasFlowToExpr` were accidentally exposed in a single version.

## 0.5.6

No user-facing changes.

## 0.5.5

### New Features

* Added support for merging two `PathGraph`s via disjoint union to allow results from multiple data flow computations in a single `path-problem` query.

### Major Analysis Improvements

* The main data flow and taint tracking APIs have been changed. The old APIs
  remain in place for now and translate to the new through a
  backwards-compatible wrapper. If multiple configurations are in scope
  simultaneously, then this may affect results slightly. The new API is quite
  similar to the old, but makes use of a configuration module instead of a
  configuration class.

### Minor Analysis Improvements

* Deleted the deprecated `getPath` and `getFolder` predicates from the `XmlFile` class.
* Deleted the deprecated `getAssertionIndex`, and `getAssertedParameter` predicates from the `AssertMethod` class.
* Deleted the deprecated `OverridableMethod` and `OverridableAccessor` classes.
* The `unsafe` predicate for `Modifiable` has been extended to cover delegate return types and identify pointer-like types at any nest level. This is relevant for `unsafe` declarations extracted from assemblies.

## 0.5.4

### Minor Analysis Improvements

* The query `cs/static-field-written-by-instance` is updated to handle properties.
* C# 11: Support for explicit interface member implementation of operators.
* The extraction of member modifiers has been generalized, which could lead to the extraction of more modifiers.
* C# 11: Added extractor and library support for `file` scoped types.
* C# 11: Added extractor support for `required` fields and properties.
* C# 11: Added library support for `checked` operators.

## 0.5.3

### Minor Analysis Improvements

* C# 11: Added extractor support for the `scoped` modifier annotation on parameters and local variables.

## 0.5.2

### Major Analysis Improvements

* Add extractor and library support for UTF-8 encoded strings.
* The `StringLiteral` class includes UTF-8 encoded strings.
* In the DB Scheme `@string_literal_expr` is renamed to `@utf16_string_literal_expr`.

### Minor Analysis Improvements

* C# 11: Added extractor support for `ref` fields in `ref struct` declarations.

## 0.5.1

### Major Analysis Improvements

* Added library support for generic attributes (also for CIL extracted attributes).
* `cil.ConstructedType::getName` was changed to include printing of the type arguments.

### Minor Analysis Improvements

* Attributes on methods in CIL are now extracted (Bugfix).
* Support for `static virtual` and `static abstract` interface members.
* Support for *operators* in interface definitions. 
* C# 11: Added support for the unsigned right shift `>>>` and unsigned right shift assignment `>>>=` operators.
* Query id's have been aligned such that they are prefixed with `cs` instead of `csharp`.

## 0.5.0

### Minor Analysis Improvements

* C# 11: Added support for list- and slice patterns in the extractor.
* Deleted the deprecated `getNameWithoutBrackets` predicate from the `ValueOrRefType` class in `Type.qll`.
* `Element::hasQualifiedName/1` has been deprecated. Use `hasQualifiedName/2` or `hasQualifiedName/3` instead.
* Added TCP/UDP sockets as taint sources.

## 0.4.6

No user-facing changes.

## 0.4.5

No user-facing changes.

## 0.4.4

### Minor Analysis Improvements

* The `[Summary|Sink|Source]ModelCsv` classes have been deprecated and Models as Data models are defined as data extensions instead.

## 0.4.3

No user-facing changes.

## 0.4.2

No user-facing changes.

## 0.4.1

### Minor Analysis Improvements

* `DateTime` expressions are now considered simple type sanitizers. This affects a wide range of security queries.
* ASP.NET Core controller definition has been made more precise. The amount of introduced taint sources or eliminated false positives should be low though, since the most common pattern is to derive all user defined ASP.NET Core controllers from the standard Controller class, which is not affected. 

## 0.4.0

### Deprecated APIs

* Some classes/modules with upper-case acronyms in their name have been renamed to follow our style-guide. 
  The old name still exists as a deprecated alias.

### Bug Fixes

* Fixed an issue in the taint tracking analysis where implicit reads were not allowed by default in sinks or additional taint steps that used flow states.

## 0.3.5

## 0.3.4

### Deprecated APIs

* Many classes/predicates/modules with upper-case acronyms in their name have been renamed to follow our style-guide. 
  The old name still exists as a deprecated alias.

### Minor Analysis Improvements

* All deprecated predicates/classes/modules that have been deprecated for over a year have been deleted.

## 0.3.3

## 0.3.2

## 0.3.1

## 0.3.0

### Deprecated APIs

* The `BarrierGuard` class has been deprecated. Such barriers and sanitizers can now instead be created using the new `BarrierGuard` parameterized module.

## 0.2.3

## 0.2.2

## 0.2.1

## 0.2.0

### Breaking Changes

* The signature of `allowImplicitRead` on `DataFlow::Configuration` and `TaintTracking::Configuration` has changed from `allowImplicitRead(DataFlow::Node node, DataFlow::Content c)` to `allowImplicitRead(DataFlow::Node node, DataFlow::ContentSet c)`.

## 0.1.0

### Breaking Changes

* The recently added flow-state versions of `isBarrierIn`, `isBarrierOut`, `isSanitizerIn`, and `isSanitizerOut` in the data flow and taint tracking libraries have been removed.

## 0.0.13

## 0.0.12

### Breaking Changes

* The flow state variants of `isBarrier` and `isAdditionalFlowStep` are no longer exposed in the taint tracking library. The `isSanitizer` and `isAdditionalTaintStep` predicates should be used instead.

### Deprecated APIs

* Many classes/predicates/modules that had upper-case acronyms have been renamed to follow our style-guide. 
  The old name still exists as a deprecated alias.

### New Features

* The data flow and taint tracking libraries have been extended with versions of `isBarrierIn`, `isBarrierOut`, and `isBarrierGuard`, respectively `isSanitizerIn`, `isSanitizerOut`, and `isSanitizerGuard`, that support flow states.

### Minor Analysis Improvements

* All deprecated predicates/classes/modules that have been deprecated for over a year have been deleted.

## 0.0.11

### Breaking Changes

* The C# extractor no longer supports the following legacy environment variables:
```
ODASA_BUILD_ERROR_DIR
ODASA_CSHARP_LAYOUT
ODASA_SNAPSHOT
SEMMLE_DIST
SEMMLE_EXTRACTOR_OPTIONS
SEMMLE_PLATFORM_TOOLS
SEMMLE_PRESERVE_SYMLINKS
SOURCE_ARCHIVE
TRAP_FOLDER
```
* `codeql test run` now extracts source code recursively from sub folders. This may break existing tests that have other tests in nested sub folders, as those will now get the nested test code included.

## 0.0.10

## 0.0.9

### Major Analysis Improvements

* Added support for C# 10 lambda improvements
  * Explicit return types on lambda expressions.
  * Lambda expression can be tagged with method and return value attributes.
* Added support for C# 10 [Extended property patterns](https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10#extended-property-patterns).
* Return value attributes are extracted.
* The QL `Attribute` class now has subclasses for each kind of attribute.

## 0.0.8

### Deprecated APIs

* The `codeql/csharp-upgrades` CodeQL pack has been removed. All upgrades scripts have been merged into the `codeql/csharp-all` CodeQL pack.

### Major Analysis Improvements

Added support for the following C# 10 features.
* [Record structs](https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10#record-structs).
* [Improvements of structure types](https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10#improvements-of-structure-types).
  * Instance parameterless constructor in a structure type.
  * Enhance `WithExpr` in QL to support `structs` and anonymous classes.
* [Global using directives](https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10#global-using-directives).
* [File-scoped namespace declaration](https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10#file-scoped-namespace-declaration).
* [Enhanced #line pragma](https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-10#enhanced-line-pragma).

### Minor Analysis Improvements

* The query `cs/local-shadows-member` no longer highlights parameters of `record` types.

## 0.0.7

## 0.0.6

## 0.0.5

## 0.0.4
