diff --git a/.globalconfig b/.globalconfig
index bdb7d56b6bd..f24b46fbd4f 100644
--- a/.globalconfig
+++ b/.globalconfig
@@ -301,7 +301,7 @@ dotnet_diagnostic.CA1828.severity = suggestion
 dotnet_diagnostic.CA1829.severity = suggestion
 
 # CA1830: Prefer strongly-typed Append and Insert method overloads on StringBuilder
-dotnet_diagnostic.CA1830.severity = suggestion
+dotnet_diagnostic.CA1830.severity = warning
 
 # CA1831: Use AsSpan or AsMemory instead of Range-based indexers when appropriate
 dotnet_diagnostic.CA1831.severity = warning
diff --git a/src/System.Management.Automation/FormatAndOutput/common/FormatViewManager.cs b/src/System.Management.Automation/FormatAndOutput/common/FormatViewManager.cs
index aca38f8994b..b493410d8e1 100644
--- a/src/System.Management.Automation/FormatAndOutput/common/FormatViewManager.cs
+++ b/src/System.Management.Automation/FormatAndOutput/common/FormatViewManager.cs
@@ -336,7 +336,7 @@ private static void ProcessUnknownViewName(TerminatingErrorContext errorContext,
                 {
                     // unKnowViewFormatStringBuilder.Append(StringUtil.Format(FormatAndOut_format_xxx.UnknownViewNameError, viewName));
                     unKnowViewFormatStringBuilder.Append(StringUtil.Format(FormatAndOut_format_xxx.UnknownViewNameErrorSuffix, viewName, formatTypeName));
-                    unKnowViewFormatStringBuilder.Append(validViewFormats.ToString());
+                    unKnowViewFormatStringBuilder.Append(validViewFormats);
                 }
                 else
                 {
diff --git a/src/System.Management.Automation/engine/ManagementObjectAdapter.cs b/src/System.Management.Automation/engine/ManagementObjectAdapter.cs
index 33dcfbd6e7b..58f582d09f1 100644
--- a/src/System.Management.Automation/engine/ManagementObjectAdapter.cs
+++ b/src/System.Management.Automation/engine/ManagementObjectAdapter.cs
@@ -873,7 +873,7 @@ internal static string GetMethodDefinition(MethodData mData)
             builder.Append("System.Management.ManagementBaseObject ");
             builder.Append(mData.Name);
             builder.Append('(');
-            builder.Append(inParameterString.ToString());
+            builder.Append(inParameterString);
             builder.Append(')');
 
             string returnValue = builder.ToString();
diff --git a/src/System.Management.Automation/engine/ProxyCommand.cs b/src/System.Management.Automation/engine/ProxyCommand.cs
index a388ccfc32d..5703adec664 100644
--- a/src/System.Management.Automation/engine/ProxyCommand.cs
+++ b/src/System.Management.Automation/engine/ProxyCommand.cs
@@ -441,7 +441,7 @@ public static string GetHelpComments(PSObject help)
                     if (exsb.Length > 0)
                     {
                         sb.Append("\n\n.EXAMPLE\n\n");
-                        sb.Append(exsb.ToString());
+                        sb.Append(exsb);
                     }
                 }
             }