clean up and use right param rather than substring

Microsoft.Toolkit.Uwp.PlatformSpecificAnalyzer/Analyzer.cs

@@ -266,7 +266,7 @@ namespace Microsoft.Toolkit.Uwp.PlatformSpecificAnalyzer
                             KindOfCheck = "IsTypePresent"
                         };
                     }
-                    else //if (target.Kind != SymbolKind.NamedType)
+                    else
                     {
                         var g = new HowToGuard
                         {

Microsoft.Toolkit.Uwp.PlatformSpecificAnalyzer/NewMember.cs

@@ -42,7 +42,7 @@ namespace Microsoft.Toolkit.Uwp.PlatformSpecificAnalyzer
             if (parts.Length == 2)
             {
                 Name = parts[0];
-                ParameterCount = int.Parse(s.Substring(s.Length - 1));
+                ParameterCount = int.Parse(parts[1]);
             }
             else
             {