Added comma to the list of replaced characters in assemblyname (#4136)

src/System.Management.Automation/engine/parser/PSType.cs

@@ -1112,13 +1112,14 @@ namespace System.Management.Automation.Language
 
             var definedTypes = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
 
-            // First character is a special mark that allows us to cheaply ignore dynamic generated assemblies in ClrFacede.GetAssemblies()
-            // Two replaces at the end are for not-allowed characters. They are replaced by similar-looking chars.
+            // First character is a special mark that allows us to cheaply ignore dynamic generated assemblies in ClrFacade.GetAssemblies()
+            // The replaces at the end are for not-allowed characters. They are replaced by similar-looking chars.
             string assemblyName = ClrFacade.FIRST_CHAR_PSASSEMBLY_MARK + (string.IsNullOrWhiteSpace(rootAst.Extent.File)
                                       ? "powershell"
                                       : rootAst.Extent.File
                                       .Replace('\\', (char)0x29f9)
                                       .Replace('/', (char)0x29f9)
+                                      .Replace(',', (char)0x201a)
                                       .Replace(':', (char)0x0589));
 
             var assembly = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName(assemblyName),

test/powershell/Language/Classes/Scripting.Classes.RunPath.Tests.ps1

@@ -0,0 +1,20 @@
+Describe "Script with a class definition run path" -Tags "CI" {
+
+    $TestCases = @(
+        @{ FileName =  'MyTest.ps1'; Name = 'path without a comma' }
+        @{ FileName = 'My,Test.ps1'; Name = 'path with a comma'    }
+    )
+
+    It "Script with a class definition can run from a <Name>" -TestCases $TestCases {
+        param( $FileName )
+
+        $FilePath = Join-Path -Path $TestDrive -ChildPath $FileName
+
+@'
+class MyClass { static [string]$MyProperty = 'Some value' }
+[MyClass]::MyProperty
+'@ | Out-File -FilePath $FilePath
+
+        ( . $FilePath ) | Should Match 'Some value'
+    }
+}