Updates to multi-threaded debugging (#8471)

* F1 keyword edits

* tweak

* tweak

* tweak

* unit testing updates

* freshness checks

* freshness checks

* Updated freshness

* Visualizer updates

* minor edits

* link fix

* fixes MicrosoftDocs/visualstudio-docs#6597

* fixes MicrosoftDocs/visualstudio-docs#6579

Author: Mikejo5000

docs/debugger/supported-code-changes-csharp.md

@@ -2,7 +2,7 @@
 title: "Supported Code Changes (C# and Visual Basic) | Microsoft Docs"
 description: Understand what code changes are supported when you are using the Edit and Continue feature while debugging a C# or Visual Basic project in Visual Studio.
 ms.custom: SEO-VS-2020
-ms.date: "10/11/2018"
+ms.date: "9/03/2020"
 ms.topic: "conceptual"
 dev_langs:
   - "CSharp"

docs/debugger/walkthrough-debugging-a-parallel-application.md

@@ -248,7 +248,7 @@ This walkthrough shows how to use the **Parallel Tasks** and **Parallel Stacks**
 
 1. To resume execution until the second breakpoint is hit, on the **Debug** menu, click **Continue**.
 
-     Previously, the **Status** column showed all tasks as Active, but now two of the tasks are Blocked. Tasks can be blocked for many different reasons. In the **Status** column, hover over a waiting task to learn why it is blocked. For example, in the following illustration, task 3 is waiting on task 4.
+     Previously, the **Status** column showed all tasks as Active, but now two of the tasks are Blocked. Tasks can be blocked for [many different reasons](/dotnet/standard/parallel-programming/potential-pitfalls-in-data-and-task-parallelism). In the **Status** column, hover over a waiting task to learn why it is blocked. For example, in the following illustration, task 3 is waiting on task 4.
 
      ![Two waiting tasks in Tasks window](../debugger/media/pdb_walkthrough_7.png "PDB_Walkthrough_7")