Use string instead of typeof

Author: dahlbyk

src/libraries/Microsoft.Extensions.Configuration.Binder/gen/Parser/KnownTypeSymbols.cs

@@ -135,7 +135,7 @@ public KnownTypeSymbols(CSharpCompilation compilation)
             Delegate = Compilation.GetSpecialType(SpecialType.System_Delegate);
 
             // Only generate nullable attributes if available
-            NotNullIfNotNullAttribute = compilation.GetBestTypeByMetadataName(typeof(System.Diagnostics.CodeAnalysis.NotNullIfNotNullAttribute));
+            NotNullIfNotNullAttribute = compilation.GetBestTypeByMetadataName("System.Diagnostics.CodeAnalysis.NotNullIfNotNullAttribute");
         }
     }
 }