diff --git a/Machining/DemoMillingByCutterLocation.cs b/Machining/DemoMillingByCutterLocation.cs
index 974da17..d3cf8e5 100644
--- a/Machining/DemoMillingByCutterLocation.cs
+++ b/Machining/DemoMillingByCutterLocation.cs
@@ -56,35 +56,35 @@ namespace Sample.Machining
 			project.Workpiece.IdealGeom = new StlFile(stlFile_CylinderR19, projectDir);
 			project.Workpiece.InitResolution = resolution_mm;
 
-			RuntimeApi runtimeApi = new RuntimeApi(localProjectService);
+			RuntimeApi runtimeApi = project.RuntimeApi;
 			runtimeApi.SetNcResolutionFixed(9999, 15);
 			runtimeApi.EnableCollisionDetection = false;
 			runtimeApi.EnablePhysics = false;
 			runtimeApi.MachiningResolution_mm = resolution_mm;
 
 			//RunConsole(project, projectDisplayee, resolution_mm);
-			RunWindow(project, projectDisplayee, resolution_mm);
+			RunWindow(localProjectService, projectDisplayee, resolution_mm);
 		}
-		static void RunConsole(MachiningProject project,
+		static void RunConsole(IProjectService projectService,
 			MachiningProjectDisplayee projectDisplayee, double resolution_mm)
 		{
-			RunSession(project, resolution_mm);
+			RunSession(projectService, resolution_mm);
 			DispEngine dispEngine = new DispEngine(projectDisplayee);
 			dispEngine.SetViewToIsometricView();
-			dispEngine.SketchView = project.ClStrip.GetFittingView(dispEngine.SketchView);
+			dispEngine.SketchView = projectService.MachiningProject.ClStrip.GetFittingView(dispEngine.SketchView);
 			dispEngine.SketchView = dispEngine.SketchView.Scale(0.5);
 			dispEngine.Snapshot($"Cache/result.bmp", 1000, 1000);
 
-			project.Dispose();
+			projectService.GetLocalProjectService().CloseProject();
 			LocalApp.AppEnd();
 			Console.WriteLine($"App exit.");
 		}
-		static void RunWindow(MachiningProject project,
+		static void RunWindow(IProjectService projectService,
 			MachiningProjectDisplayee projectDisplayee, double resolution_mm)
 		{
 			var task = Task.Run(() =>
 			{
-				RunSession(project, resolution_mm);
+				RunSession(projectService, resolution_mm);
 				Console.WriteLine($"task done.");
 			}).ShowIfCatched(null);
 
@@ -95,7 +95,7 @@ namespace Sample.Machining
 			};
 			app.Exit += (o, e) =>
 			{
-				project.Dispose();
+				projectService.GetLocalProjectService().CloseProject();
 				LocalApp.AppEnd();
 				Console.WriteLine($"App exit.");
 			};
@@ -106,9 +106,10 @@ namespace Sample.Machining
 			});
 			#endregion
 		}
-		static void RunSession(MachiningProject project, double resolution_mm)
+		static void RunSession(IProjectService projectService, double resolution_mm)
 		{
-			RuntimeApi runtimeApi = new RuntimeApi(project);
+			var project=projectService.MachiningProject;
+			RuntimeApi runtimeApi = project.RuntimeApi;
 
 			project.BeginSession();
 			double radius = 20;