diff --git a/lang/csharp/src/vcryptpp.sln b/lang/csharp/src/vcryptpp.sln
index 19b2c4de6..d9bea3805 100644
--- a/lang/csharp/src/vcryptpp.sln
+++ b/lang/csharp/src/vcryptpp.sln
@@ -2,7 +2,7 @@
 # Visual Studio Version 17
 VisualStudioVersion = 17.9.34622.214
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "vcryptpp", "vcryptpp\vcryptpp.csproj", "{1A936830-5F97-4722-9012-67A324764879}"
+Project("{3D6B5B52-47BF-4FB9-9B11-261BC3E44F2C}") = "vcryptpp", "vcryptpp\vcryptpp.csproj", "{1A936830-5F97-4722-9012-67A324764879}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution