Added v4 clarification and fixed tabs

Author: ggailey777

articles/azure-functions/functions-reference-csharp.md

@@ -358,12 +358,14 @@ The following assemblies are automatically added by the Azure Functions hosting
 
 The following assemblies may be referenced by simple-name, by runtime version:
 
-# [Version 2.x+](#tab/v2)
+# [v2.x+](#tab/functionsv2)
 
 * `Newtonsoft.Json`
-* `Microsoft.WindowsAzure.Storage`
+* `Microsoft.WindowsAzure.Storage`<sup>*</sup>
 
-# [Version 1.x](#tab/v1)
+<sup>*</sup>Removed in version 4.x of the runtime.
+
+# [v1.x](#tab/functionsv1)
 
 * `Newtonsoft.Json`
 * `Microsoft.WindowsAzure.Storage`
@@ -373,6 +375,7 @@ The following assemblies may be referenced by simple-name, by runtime version:
 
 ---
 
+
 In code, assemblies are referenced like the following example:
 
 ```csharp