Merge pull request #7 from maiak/dev/bertaygu/getstarted

Updates to getting started docs

Author: maiak

docs/extensibility/visualstudio.extensibility/get-started/tutorial-create-simple-extension.md

@@ -93,11 +93,10 @@ public override async Task ExecuteCommandAsync(IClientContext context, Cancellat
             return;
         }
 
-        var document = await textView.GetTextDocumentAsync(cancellationToken);
         await this.Extensibility.Editor().EditAsync(
             batch =>
             {
-                document.AsEditable(batch).Replace(textView.Selection.Extent, newGuidString);
+                textView.Document.AsEditable(batch).Replace(textView.Selection.Extent, newGuidString);
             },
             cancellationToken);
     }
@@ -107,8 +106,6 @@ The first line validates the arguments, then we create a new `Guid` to use later
 
 Then, we create an `ITextViewSnapshot` (the `textView` object here) by calling the asynchronous method `GetActiveTextViewAsync`. A cancellation token is passed in to preserve the ability to cancel the asynchronous request, but this isn't demonstrated in this sample. If we don't get a text view successfully, we'll write to the log and terminate without doing anything else.
 
-Next, we request the document, an instance of `ITextDocumentSnapshot` (here `document`).
-
 Now we're ready to call the asynchronous method that submits an edit request to Visual Studio's editor. The method we want is `EditAsync`. That's a member of the `EditorExtensibility` class, which allows interaction with the running Visual Studio Editor in the IDE. The `Command` type, which your own `InsertGuidCommand` class inherits from, has a member `Extensibility` that provides access to the `EditorExtensibility` object, so we can get to the `EditorExtensibility` class with a call to `this.Extensibility.Editor()`.
 
 The `EditAsync` method takes an `Action<IEditBatch>` as a parameter. This is called `editorSource`,
@@ -119,7 +116,7 @@ The call to `EditAsync` uses a lambda expression. To break this down a little, y
 await this.Extensibility.Editor().EditAsync(
     batch =>
     {
-        var editor = document.AsEditable(batch);
+        var editor = textView.Document.AsEditable(batch);
         // specify the desired changes here:
         editor.Replace(textView.Selection.Extent, newGuidString);
     },