diff --git a/Import/GacUI.cpp b/Import/GacUI.cpp
index cdb26612..8eacbb41 100644
--- a/Import/GacUI.cpp
+++ b/Import/GacUI.cpp
@@ -43434,7 +43434,7 @@ GuiResourceFolder
 			}
 		}
 
-		void GuiResourceFolder::InitializeResourceFolder(GuiResourcePrecompileContext& context)
+		void GuiResourceFolder::InitializeResourceFolder(GuiResourceInitializeContext& context)
 		{
 			FOREACH(Ptr<GuiResourceItem>, item, items.Values())
 			{
@@ -43744,7 +43744,7 @@ GuiResource
 			}
 		}
 
-		void GuiResource::Initialize()
+		void GuiResource::Initialize(GuiResourceUsage usage)
 		{
 			auto precompiledFolder = GetFolder(L"Precompiled");
 			if (!precompiledFolder)
@@ -43753,10 +43753,11 @@ GuiResource
 				return;
 			}
 			
-			GuiResourcePrecompileContext context;
+			GuiResourceInitializeContext context;
 			context.rootResource = this;
 			context.resolver = new GuiResourcePathResolver(this, workingDirectory);
 			context.targetFolder = precompiledFolder;
+			context.usage = usage;
 
 			vint maxPass = GetResourceResolverManager()->GetMaxInitializePassIndex();
 			for (vint i = 0; i <= maxPass; i++)
diff --git a/Import/GacUI.h b/Import/GacUI.h
index f661e8fb..b1e378f8 100644
--- a/Import/GacUI.h
+++ b/Import/GacUI.h
@@ -3363,6 +3363,7 @@ Resource Structure
 		class DocumentModel;
 		class GuiResourcePathResolver;
 		struct GuiResourcePrecompileContext;
+		struct GuiResourceInitializeContext;
 		
 		/// <summary>Resource item.</summary>
 		class GuiResourceItem : public GuiResourceNodeBase, public Description<GuiResourceItem>
@@ -3430,7 +3431,7 @@ Resource Structure
 			void									LoadResourceFolderFromBinary(DelayLoadingList& delayLoadings, stream::internal::Reader& reader, collections::List<WString>& typeNames, collections::List<WString>& errors);
 			void									SaveResourceFolderToBinary(stream::internal::Writer& writer, collections::List<WString>& typeNames);
 			void									PrecompileResourceFolder(GuiResourcePrecompileContext& context, collections::List<WString>& errors);
-			void									InitializeResourceFolder(GuiResourcePrecompileContext& context);
+			void									InitializeResourceFolder(GuiResourceInitializeContext& context);
 		public:
 			/// <summary>Create a resource folder.</summary>
 			GuiResourceFolder();
@@ -3493,6 +3494,12 @@ Resource Structure
 /***********************************************************************
 Resource
 ***********************************************************************/
+
+		enum class GuiResourceUsage
+		{
+			DevelopmentTool,
+			Application,
+		};
 		
 		/// <summary>Resource. A resource is a root resource folder that does not have a name.</summary>
 		class GuiResource : public GuiResourceFolder, public Description<GuiResource>
@@ -3542,7 +3549,7 @@ Resource
 			void									Precompile(collections::List<WString>& errors);
 
 			/// <summary>Initialize a precompiled resource.</summary>
-			void									Initialize();
+			void									Initialize(GuiResourceUsage usage);
 			
 			/// <summary>Get a contained document model using a path like "Packages\Application\Name". If the path does not exists or the type does not match, an exception will be thrown.</summary>
 			/// <returns>The containd resource object.</returns>
@@ -3689,6 +3696,12 @@ Resource Type Resolver
 			virtual void										Precompile(Ptr<GuiResourceItem> resource, GuiResourcePrecompileContext& context, collections::List<WString>& errors) = 0;
 		};
 
+		/// <summary>Provide a context for resource initializing</summary>
+		struct GuiResourceInitializeContext : GuiResourcePrecompileContext
+		{
+			GuiResourceUsage									usage;
+		};
+
 		/// <summary>
 		///		Represents a precompiler for resources of a specified type.
 		///		Current resources that needs precompiling:
@@ -3706,7 +3719,7 @@ Resource Type Resolver
 			/// <param name="resource">The resource to initializer.</param>
 			/// <param name="context">The context for initializing.</param>
 			/// <param name="errors">All collected errors during loading a resource.</param>
-			virtual void										Initialize(Ptr<GuiResourceItem> resource, GuiResourcePrecompileContext& context) = 0;
+			virtual void										Initialize(Ptr<GuiResourceItem> resource, GuiResourceInitializeContext& context) = 0;
 		};
 
 		/// <summary>Represents a symbol type for loading a resource without a preload type.</summary>
diff --git a/Import/GacUIReflection.cpp b/Import/GacUIReflection.cpp
index a4220c45..d5f3500c 100644
--- a/Import/GacUIReflection.cpp
+++ b/Import/GacUIReflection.cpp
@@ -977,12 +977,12 @@ GuiInstanceLoaderManager
 				return GlobalStringKey::Empty;
 			}
 
-			bool SetResource(const WString& name, Ptr<GuiResource> resource)override
+			bool SetResource(const WString& name, Ptr<GuiResource> resource, GuiResourceUsage usage)override
 			{
 				vint index = resources.Keys().IndexOf(name);
 				if (index != -1) return false;
 				
-				resource->Initialize();
+				resource->Initialize(usage);
 				resources.Add(name, resource);
 				GetClassesInResource(resource, resource);
 				return true;
@@ -1588,7 +1588,7 @@ Compiled Workflow Type Resolver (Script)
 				return 2;
 			}
 
-			void Initialize(Ptr<GuiResourceItem> resource, GuiResourcePrecompileContext& context)override
+			void Initialize(Ptr<GuiResourceItem> resource, GuiResourceInitializeContext& context)override
 			{
 				if (auto compiled = resource->GetContent().Cast<GuiInstanceCompiledWorkflow>())
 				{
@@ -1597,7 +1597,10 @@ Compiled Workflow Type Resolver (Script)
 					case 0:
 						if (compiled->type == GuiInstanceCompiledWorkflow::ViewModel)
 						{
-							compiled->Initialize(false);
+							if (context.usage == GuiResourceUsage::DevelopmentTool)
+							{
+								compiled->Initialize(false);
+							}
 						}
 						break;
 					case 1:
diff --git a/Import/GacUIReflection.h b/Import/GacUIReflection.h
index eed469c4..3eb75aa4 100644
--- a/Import/GacUIReflection.h
+++ b/Import/GacUIReflection.h
@@ -589,7 +589,7 @@ Instance Loader Manager
 			virtual description::ITypeDescriptor*		GetTypeDescriptorForType(GlobalStringKey typeName) = 0;
 			virtual void								GetVirtualTypes(collections::List<GlobalStringKey>& typeNames) = 0;
 			virtual GlobalStringKey						GetParentTypeForVirtualType(GlobalStringKey virtualType) = 0;
-			virtual bool								SetResource(const WString& name, Ptr<GuiResource> resource) = 0;
+			virtual bool								SetResource(const WString& name, Ptr<GuiResource> resource, GuiResourceUsage usage = GuiResourceUsage::Application) = 0;
 			virtual Ptr<GuiResource>					GetResource(const WString& name) = 0;
 			virtual Ptr<GuiInstanceConstructorResult>	RunInstanceConstructor(const WString& classFullName, description::Value instance) = 0;
 		};
diff --git a/Tools/GacGen.exe b/Tools/GacGen.exe
index 75a3c39e..6b7f87d0 100644
Binary files a/Tools/GacGen.exe and b/Tools/GacGen.exe differ
diff --git a/Tools/ParserGen.exe b/Tools/ParserGen.exe
index 3c442ab0..2bccc953 100644
Binary files a/Tools/ParserGen.exe and b/Tools/ParserGen.exe differ
diff --git a/Tutorial/GacUI_HelloWorlds/UIRes/MVVM.bin b/Tutorial/GacUI_HelloWorlds/UIRes/MVVM.bin
index c9b56634..6ad268b8 100644
Binary files a/Tutorial/GacUI_HelloWorlds/UIRes/MVVM.bin and b/Tutorial/GacUI_HelloWorlds/UIRes/MVVM.bin differ