diff --git a/AIStudio.Wpf.Diagram.sln b/AIStudio.Wpf.Diagram.sln
index 04a3040..3d98351 100644
--- a/AIStudio.Wpf.Diagram.sln
+++ b/AIStudio.Wpf.Diagram.sln
@@ -33,8 +33,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Demos", "Demos", "{62DC8608
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AIStudio.Wpf.DiagramDesigner.Demo", "Demos\AIStudio.Wpf.DiagramDesigner.Demo\AIStudio.Wpf.DiagramDesigner.Demo.csproj", "{FCFC5ABF-8459-4B45-ABA0-9B820C7ED5C6}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Apps", "Apps", "{BF9D3CCF-661F-4D1C-8186-A52CD7A42019}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU