fixed links in the articles

Author: vlada-shubina

docs/core/testing/unit-testing-code-coverage.md

@@ -22,7 +22,7 @@ The "system under test" refers to the code that you're writing unit tests agains
 
 ### Create a class library
 
-From a command prompt in a new directory named `UnitTestingCodeCoverage`, create a new .NET standard class library using the [`dotnet new classlib`](../tools/dotnet-new.md#classlib) command:
+From a command prompt in a new directory named `UnitTestingCodeCoverage`, create a new .NET standard class library using the [`dotnet new classlib`](../tools/dotnet-new-sdk-templates.md#classlib) command:
 
 ```dotnetcli
 dotnet new classlib -n Numbers
@@ -60,7 +60,7 @@ namespace System.Numbers
 
 ### Create test projects
 
-Create two new **xUnit Test Project (.NET Core)** templates from the same command prompt using the [`dotnet new xunit`](../tools/dotnet-new.md#test) command:
+Create two new **xUnit Test Project (.NET Core)** templates from the same command prompt using the [`dotnet new xunit`](../tools/dotnet-new-sdk-templates.md#test) command:
 
 ```dotnetcli
 dotnet new xunit -n XUnit.Coverlet.Collector

docs/csharp/programming-guide/concepts/async/cancel-an-async-task-or-a-list-of-tasks.md

@@ -28,7 +28,7 @@ This tutorial requires the following:
 
 ### Create example application
 
-Create a new .NET Core console application. You can create one by using the [`dotnet new console`](../../../../core/tools/dotnet-new.md#console) command or from [Visual Studio](/visualstudio/install/install-visual-studio). Open the *Program.cs* file in your favorite code editor.
+Create a new .NET Core console application. You can create one by using the [`dotnet new console`](../../../../core/tools/dotnet-new-sdk-templates.md#console) command or from [Visual Studio](/visualstudio/install/install-visual-studio). Open the *Program.cs* file in your favorite code editor.
 
 ### Replace using statements
 

docs/csharp/programming-guide/concepts/async/start-multiple-async-tasks-and-process-them-as-they-complete.md

@@ -14,7 +14,7 @@ The following example uses a query to create a collection of tasks. Each task do
 
 ## Create example application
 
-Create a new .NET Core console application. You can create one by using the [dotnet new console](../../../../core/tools/dotnet-new.md#console) command or from [Visual Studio](/visualstudio/install/install-visual-studio). Open the *Program.cs* file in your favorite code editor.
+Create a new .NET Core console application. You can create one by using the [dotnet new console](../../../../core/tools/dotnet-new-sdk-templates.md#console) command or from [Visual Studio](/visualstudio/install/install-visual-studio). Open the *Program.cs* file in your favorite code editor.
 
 ### Replace using statements