[no-merge] Add unit tests for Issue389

[ericnewton76]

This tries to address #389

Note, this PR may never get merged.

[moh-hassan]

The resolve this issue , the test class should reference the next class:

	 public class BaseTest
		{
			public BaseTest()  
			{  
				//in case multi target project,use #if because no appdomain in netcore
	#if NETFRAMEWORK
			  
				var assembly = Assembly.GetCallingAssembly();  

				var manager = new AppDomainManager();  
				var entryAssemblyfield = manager.GetType().GetField("m_entryAssembly", BindingFlags.Instance | BindingFlags.NonPublic);  
				entryAssemblyfield?.SetValue(manager, assembly); 

				var domain = AppDomain.CurrentDomain;  
				var domainManagerField = domain.GetType().GetField("_domainManager", BindingFlags.Instance | BindingFlags.NonPublic);  
				domainManagerField?.SetValue(domain, manager);  
				
	#endif
			} 
		}

Then test class inherit BaseTest:

      public class Issue389_Tests: BaseTest
   {
      //test stuff
      }

The solution is tested for the same issue#389 here

[moh-hassan]

The test case is involved and Pass in PR 389 in both net461 and netcoreapp2.0 after resolving the null EntryAssemply problems

[moh-hassan]

@ericnewton76
It's added and merged to PR #430