Made some changes to DTH

- Added RefreshDependencies message
- Fixed issue in DesignTimeAssemblyLoadContextFactory where it
wasn't picking up changes because of the trigger name changes
- Renamed _restoreComplete to _refreshDependencies

#1439

src/Microsoft.Framework.DesignTimeHost/ApplicationContext.cs

@@ -35,7 +35,7 @@ public class ApplicationContext
         private readonly Trigger<Void> _pluginWorkNeeded = new Trigger<Void>();
         private readonly Trigger<Void> _filesChanged = new Trigger<Void>();
         private readonly Trigger<Void> _rebuild = new Trigger<Void>();
-        private readonly Trigger<Void> _restoreComplete = new Trigger<Void>();
+        private readonly Trigger<Void> _refreshDependencies = new Trigger<Void>();
         private readonly Trigger<Void> _sourceTextChanged = new Trigger<Void>();
         private readonly Trigger<Void> _requiresCompilation = new Trigger<Void>();
 
@@ -250,9 +250,10 @@ private bool ProcessMessage()
                         _configuration.Value = data.Configuration;
                     }
                     break;
+                case "RefreshDependencies":
                 case "RestoreComplete":
                     {
-                        _restoreComplete.Value = default(Void);
+                        _refreshDependencies.Value = default(Void);
                     }
                     break;
                 case "Rebuild":
@@ -336,19 +337,19 @@ private bool ResolveDependencies()
                 _configuration.WasAssigned ||
                 _filesChanged.WasAssigned ||
                 _rebuild.WasAssigned ||
-                _restoreComplete.WasAssigned ||
+                _refreshDependencies.WasAssigned ||
                 _sourceTextChanged.WasAssigned ||
                 _pluginRegistration.WasAssigned)
             {
                 bool triggerBuildOutputs = _rebuild.WasAssigned || _filesChanged.WasAssigned;
-                bool triggerDependencies = _restoreComplete.WasAssigned || _rebuild.WasAssigned;
+                bool triggerDependencies = _refreshDependencies.WasAssigned || _rebuild.WasAssigned;
 
                 _appPath.ClearAssigned();
                 _configuration.ClearAssigned();
                 _filesChanged.ClearAssigned();
                 _rebuild.ClearAssigned();
                 _sourceTextChanged.ClearAssigned();
-                _restoreComplete.ClearAssigned();
+                _refreshDependencies.ClearAssigned();
 
                 // Trigger that the project outputs changes in case the runtime process
                 // hasn't died yet

src/Microsoft.Framework.DesignTimeHost/DesignTimeAssemblyLoadContextFactory.cs

@@ -63,7 +63,7 @@ private IAssemblyLoadContextFactory GetRuntimeFactory()
                 }
 
                 // Add a cache dependency on restore complete to reevaluate dependencies
-                ctx.Monitor(_namedDependencyProvider.GetNamedDependency(_project.Name + "_RestoreComplete"));
+                ctx.Monitor(_namedDependencyProvider.GetNamedDependency(_project.Name + "_Dependencies"));
 
                 return new AssemblyLoadContextFactory(applicationHostContext.ServiceProvider);
             });