diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/CSVCommands.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/CSVCommands.cs
index 12a1fa15a4f..6b14a2cf29a 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/CSVCommands.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/CSVCommands.cs
@@ -207,17 +207,7 @@ public SwitchParameter NoClobber
         /// </summary>
         [Parameter()]
         [ArgumentToEncodingTransformationAttribute()]
-        [ArgumentCompletions(
-            EncodingConversion.Ascii,
-            EncodingConversion.BigEndianUnicode,
-            EncodingConversion.OEM,
-            EncodingConversion.Unicode,
-            EncodingConversion.Utf7,
-            EncodingConversion.Utf8,
-            EncodingConversion.Utf8Bom,
-            EncodingConversion.Utf8NoBom,
-            EncodingConversion.Utf32
-            )]
+        [ArgumentEncodingCompletionsAttribute]
         [ValidateNotNullOrEmpty]
         public Encoding Encoding { get; set; } = ClrFacade.GetDefaultEncoding();
 
@@ -591,17 +581,7 @@ public SwitchParameter UseCulture
         /// </summary>
         [Parameter()]
         [ArgumentToEncodingTransformationAttribute()]
-        [ArgumentCompletions(
-            EncodingConversion.Ascii,
-            EncodingConversion.BigEndianUnicode,
-            EncodingConversion.OEM,
-            EncodingConversion.Unicode,
-            EncodingConversion.Utf7,
-            EncodingConversion.Utf8,
-            EncodingConversion.Utf8Bom,
-            EncodingConversion.Utf8NoBom,
-            EncodingConversion.Utf32
-            )]
+        [ArgumentEncodingCompletionsAttribute]
         [ValidateNotNullOrEmpty]
         public Encoding Encoding { get; set; } = ClrFacade.GetDefaultEncoding();
 
diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/FormatAndOutput/format-hex/Format-Hex.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/FormatAndOutput/format-hex/Format-Hex.cs
index 42000ec5cad..5105c6280b2 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/FormatAndOutput/format-hex/Format-Hex.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/FormatAndOutput/format-hex/Format-Hex.cs
@@ -50,17 +50,7 @@ public sealed class FormatHex : PSCmdlet
         /// </summary>
         [Parameter(ParameterSetName = "ByInputObject")]
         [ArgumentToEncodingTransformationAttribute()]
-        [ArgumentCompletions(
-            EncodingConversion.Ascii,
-            EncodingConversion.BigEndianUnicode,
-            EncodingConversion.OEM,
-            EncodingConversion.Unicode,
-            EncodingConversion.Utf7,
-            EncodingConversion.Utf8,
-            EncodingConversion.Utf8Bom,
-            EncodingConversion.Utf8NoBom,
-            EncodingConversion.Utf32
-            )]
+        [ArgumentEncodingCompletionsAttribute]
         [ValidateNotNullOrEmpty]
         public Encoding Encoding { get; set; } = ClrFacade.GetDefaultEncoding();
 
diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/FormatAndOutput/out-file/Out-File.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/FormatAndOutput/out-file/Out-File.cs
index 05ef11595da..f25e6e80de0 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/FormatAndOutput/out-file/Out-File.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/FormatAndOutput/out-file/Out-File.cs
@@ -72,17 +72,7 @@ public string LiteralPath
         /// </summary>
         [Parameter(Position = 1)]
         [ArgumentToEncodingTransformationAttribute()]
-        [ArgumentCompletions(
-            EncodingConversion.Ascii,
-            EncodingConversion.BigEndianUnicode,
-            EncodingConversion.OEM,
-            EncodingConversion.Unicode,
-            EncodingConversion.Utf7,
-            EncodingConversion.Utf8,
-            EncodingConversion.Utf8Bom,
-            EncodingConversion.Utf8NoBom,
-            EncodingConversion.Utf32
-            )]
+        [ArgumentEncodingCompletionsAttribute]
         [ValidateNotNullOrEmpty]
         public Encoding Encoding { get; set; } = ClrFacade.GetDefaultEncoding();
 
diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/ImplicitRemotingCommands.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/ImplicitRemotingCommands.cs
index 5dd06b479ed..422063f8d8d 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/ImplicitRemotingCommands.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/ImplicitRemotingCommands.cs
@@ -77,17 +77,7 @@ public SwitchParameter Force
         /// </summary>
         [Parameter]
         [ArgumentToEncodingTransformationAttribute()]
-        [ArgumentCompletions(
-            EncodingConversion.Ascii,
-            EncodingConversion.BigEndianUnicode,
-            EncodingConversion.OEM,
-            EncodingConversion.Unicode,
-            EncodingConversion.Utf7,
-            EncodingConversion.Utf8,
-            EncodingConversion.Utf8Bom,
-            EncodingConversion.Utf8NoBom,
-            EncodingConversion.Utf32
-            )]
+        [ArgumentEncodingCompletionsAttribute]
         [ValidateNotNullOrEmpty]
         public Encoding Encoding { get; set; } = ClrFacade.GetDefaultEncoding();
 
diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/MatchString.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/MatchString.cs
index 12fdbbd73b2..2c57c95910c 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/MatchString.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/MatchString.cs
@@ -1195,17 +1195,7 @@ public SwitchParameter AllMatches
         /// </summary>
         [Parameter]
         [ArgumentToEncodingTransformationAttribute()]
-        [ArgumentCompletions(
-            EncodingConversion.Ascii,
-            EncodingConversion.BigEndianUnicode,
-            EncodingConversion.OEM,
-            EncodingConversion.Unicode,
-            EncodingConversion.Utf7,
-            EncodingConversion.Utf8,
-            EncodingConversion.Utf8Bom,
-            EncodingConversion.Utf8NoBom,
-            EncodingConversion.Utf32
-            )]
+        [ArgumentEncodingCompletionsAttribute]
         [ValidateNotNullOrEmpty]
         public Encoding Encoding { get; set; } = ClrFacade.GetDefaultEncoding();
 
diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Send-MailMessage.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Send-MailMessage.cs
index 64fa3d1aace..e77c1b6df80 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Send-MailMessage.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Send-MailMessage.cs
@@ -60,17 +60,7 @@ public sealed class SendMailMessage : PSCmdlet
         [Parameter(ValueFromPipelineByPropertyName = true)]
         [Alias("BE")]
         [ValidateNotNullOrEmpty]
-        [ArgumentCompletions(
-            EncodingConversion.Ascii,
-            EncodingConversion.BigEndianUnicode,
-            EncodingConversion.OEM,
-            EncodingConversion.Unicode,
-            EncodingConversion.Utf7,
-            EncodingConversion.Utf8,
-            EncodingConversion.Utf8Bom,
-            EncodingConversion.Utf8NoBom,
-            EncodingConversion.Utf32
-            )]
+        [ArgumentEncodingCompletionsAttribute]
         [ArgumentToEncodingTransformationAttribute]
         public Encoding Encoding { get; set; } = Encoding.ASCII;
 
diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/XmlCommands.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/XmlCommands.cs
index a1c2f9d126a..1fa3f9befa5 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/XmlCommands.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/XmlCommands.cs
@@ -107,17 +107,7 @@ public SwitchParameter NoClobber
         /// </summary>
         [Parameter]
         [ArgumentToEncodingTransformationAttribute()]
-        [ArgumentCompletions(
-            EncodingConversion.Ascii,
-            EncodingConversion.BigEndianUnicode,
-            EncodingConversion.OEM,
-            EncodingConversion.Unicode,
-            EncodingConversion.Utf7,
-            EncodingConversion.Utf8,
-            EncodingConversion.Utf8Bom,
-            EncodingConversion.Utf8NoBom,
-            EncodingConversion.Utf32
-            )]
+        [ArgumentEncodingCompletionsAttribute]
         [ValidateNotNullOrEmpty]
         public Encoding Encoding { get; set; } = ClrFacade.GetDefaultEncoding();
 
diff --git a/src/System.Management.Automation/namespaces/FileSystemProvider.cs b/src/System.Management.Automation/namespaces/FileSystemProvider.cs
index d8a2a9151d0..4c9308cd409 100644
--- a/src/System.Management.Automation/namespaces/FileSystemProvider.cs
+++ b/src/System.Management.Automation/namespaces/FileSystemProvider.cs
@@ -7212,17 +7212,7 @@ public class FileSystemContentDynamicParametersBase
         /// </summary>
         [Parameter]
         [ArgumentToEncodingTransformationAttribute()]
-        [ArgumentCompletions(
-            EncodingConversion.Ascii,
-            EncodingConversion.BigEndianUnicode,
-            EncodingConversion.OEM,
-            EncodingConversion.Unicode,
-            EncodingConversion.Utf7,
-            EncodingConversion.Utf8,
-            EncodingConversion.Utf8Bom,
-            EncodingConversion.Utf8NoBom,
-            EncodingConversion.Utf32
-            )]
+        [ArgumentEncodingCompletionsAttribute]
         [ValidateNotNullOrEmpty]
         public Encoding Encoding
         {
diff --git a/src/System.Management.Automation/utils/EncodingUtils.cs b/src/System.Management.Automation/utils/EncodingUtils.cs
index 583d3282e17..e23e5506917 100644
--- a/src/System.Management.Automation/utils/EncodingUtils.cs
+++ b/src/System.Management.Automation/utils/EncodingUtils.cs
@@ -102,4 +102,22 @@ public override object Transform(EngineIntrinsics engineIntrinsics, object input
 
     }
 
+    /// <summary>
+    /// Provides the set of Encoding values for tab completion of an Encoding parameter.
+    /// </summary>
+    internal sealed class ArgumentEncodingCompletionsAttribute : ArgumentCompletionsAttribute
+    {
+        public ArgumentEncodingCompletionsAttribute() : base(
+            EncodingConversion.Ascii,
+            EncodingConversion.BigEndianUnicode,
+            EncodingConversion.OEM,
+            EncodingConversion.Unicode,
+            EncodingConversion.Utf7,
+            EncodingConversion.Utf8,
+            EncodingConversion.Utf8Bom,
+            EncodingConversion.Utf8NoBom,
+            EncodingConversion.Utf32
+        )
+        {}
+    }
 }