Do not offer add parameter on a type that cannot become a parameter (#79060)

Author: CyrusNajmabadi

src/Features/CSharpTest/IntroduceParameter/IntroduceParameterTests.cs

@@ -2220,4 +2220,21 @@ public void Test(string s)
 
         await TestMissingInRegularAndScriptAsync(code);
     }
+
+    [Fact]
+    public async Task TestNotOnNamedType1()
+    {
+        await TestMissingInRegularAndScriptAsync(
+            """
+            using System;
+
+            class C
+            {
+                void M()
+                {
+                    [||]Console.WriteLine();
+                }
+            }
+            """);
+    }
 }

src/Features/CSharpTest/IntroduceVariable/IntroduceVariableTests.cs

@@ -9568,4 +9568,32 @@ class C
             parseOptions: null,
             index: 1);
     }
+
+    [Fact]
+    public async Task TestNotOnNamedType1()
+    {
+        await TestMissingInRegularAndScriptAsync(
+            """
+            using System;
+
+            class C
+            {
+                void M()
+                {
+                    [||]Console.WriteLine();
+                }
+            }
+            """);
+    }
+
+    [Fact]
+    public async Task TestNotOnNamedType2()
+    {
+        await TestMissingInRegularAndScriptAsync(
+            """
+            using System;
+            
+            [||]Console.WriteLine();
+            """);
+    }
 }

src/Features/Core/Portable/IntroduceParameter/AbstractIntroduceParameterCodeRefactoringProvider.cs

@@ -78,6 +78,11 @@ public sealed override async Task ComputeRefactoringsAsync(CodeRefactoringContex
         if (expressionSymbol is IParameterSymbol parameterSymbol && parameterSymbol.ContainingSymbol.Equals(containingSymbol))
             return;
 
+        // Direct reference to named type or type parameter.  e.g. `$$Console.WriteLine()` or `T.Add(...)`.  These 
+        // are effectively statics (not values) and cannot become parameter.
+        if (expressionSymbol is INamedTypeSymbol or ITypeParameterSymbol)
+            return;
+
         // Code actions for trampoline and overloads will not be offered if the method is a constructor.
         // Code actions for overloads will not be offered if the method if the method is a local function.
         var methodKind = methodSymbol.MethodKind;