Typescripts namespace styling change (#289)

* merge conflict

* format-document

* Changes to getmainnamesace method

* Splitting lines to use if else, stacking switch case labels

* Using nullable check

Author: nikithauc

src/GraphODataTemplateWriter/CodeHelpers/TypeScript/TypeScriptNamespace.cs

@@ -45,7 +45,13 @@ public class TypeScriptNamespace
         /// <returns></returns>
         public string GetMainNamespace()
         {
-            return TypeScriptMainNamespaceNamePrefix + (ConfigurationService.Settings.Properties != null && ConfigurationService.Settings.Properties.ContainsKey("typescript.namespacePostfix") ? ConfigurationService.Settings.Properties["typescript.namespacePostfix"] : string.Empty);
+            if (ConfigurationService.Settings.Properties?.ContainsKey("typescript.namespacePostfix") == true)
+            {
+
+                return TypeScriptMainNamespaceNamePrefix + ConfigurationService.Settings.Properties["typescript.namespacePostfix"];
+            }
+
+            return TypeScriptMainNamespaceNamePrefix;
         }
 
         /// <summary>

test/Typewriter.Test/MultipleNamespacesTestRunner.cs

@@ -38,13 +38,10 @@ string getMetadataFile(TestLanguage testLanguage)
                 switch (testLanguage)
                 {
                     case TestLanguage.CSharp:
-                        return MetadataMultipleNamespacesFile;
                     case TestLanguage.Java:
                         return MetadataMultipleNamespacesFile;
                     case TestLanguage.TypeScript:
-                        return MetadataWithSubNamespacesFile;
                     case TestLanguage.PHP:
-                        return MetadataWithSubNamespacesFile;
                     case TestLanguage.ObjC:
                         return MetadataWithSubNamespacesFile;
                     default: