Updated all sections of the tutorial

Author: ivaylokenov

docs/_docfx/tutorial/extensionmethods.md

@@ -95,13 +95,14 @@ We remove the magic string:
 We need to extend the **"IControllerActionAttributesTestBuilder<TAttributesTestBuilder>"** interface. Add **"ControllerActionAttributeExtensions"** class with the following code in it:
 
 ```c#
+using MyTested.AspNetCore.Mvc;
 using MyTested.AspNetCore.Mvc.Builders.Contracts.Attributes;
 
 public static class ControllerActionAttributeExtensions
 {
     public static TAttributesTestBuilder SpecifyingAdminArea<TAttributesTestBuilder>(
         this IControllerActionAttributesTestBuilder<TAttributesTestBuilder> builder)
-        where TAttributesTestBuilder : IBaseAttributesTestBuilder<TAttributesTestBuilder>
+        where TAttributesTestBuilder : IControllerActionAttributesTestBuilder<TAttributesTestBuilder>
         => builder.SpecifyingArea("Admin");
 }
 ```

docs/_docfx/tutorial/testconfig.md

@@ -1,6 +1,6 @@
 # Test Configuration
 
-In this section we are going to examine the test configuration or the **"testconfig.json"** file we used to provide a license key for the library.
+In this section we are going to examine the test configuration or the **"testsettings.json"** file we used to provide a license key for the library.
 
 ## Startup class
 
@@ -43,6 +43,7 @@ Various general settings are available for you to explore:
     "AsynchronousTests": false,
     "WebAssemblyName": "MyApp",
     "TestAssemblyName": "MyApp.Test",
+	"AutomaticApplicationParts": true
   }
 }
 ```