diff --git a/.vs/c-sharp/v17/.suo b/.vs/c-sharp/v17/.suo
index 41f88ef..0c29afa 100644
Binary files a/.vs/c-sharp/v17/.suo and b/.vs/c-sharp/v17/.suo differ
diff --git a/AtlagHom/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache b/AtlagHom/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
index ce35228..94487e9 100644
Binary files a/AtlagHom/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache and b/AtlagHom/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache differ
diff --git a/BuborekRendezes/obj/Debug/BuborekRendezes.csproj.AssemblyReference.cache b/BuborekRendezes/obj/Debug/BuborekRendezes.csproj.AssemblyReference.cache
index 97c8c82..204fdef 100644
Binary files a/BuborekRendezes/obj/Debug/BuborekRendezes.csproj.AssemblyReference.cache and b/BuborekRendezes/obj/Debug/BuborekRendezes.csproj.AssemblyReference.cache differ
diff --git a/BuborekRendezes/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache b/BuborekRendezes/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
index 8772cff..989eed9 100644
Binary files a/BuborekRendezes/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache and b/BuborekRendezes/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache differ
diff --git a/MinMax/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache b/MinMax/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
index 44d3e65..bdc5b3f 100644
Binary files a/MinMax/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache and b/MinMax/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache differ
diff --git a/MinMax/obj/Debug/MinMax.csproj.AssemblyReference.cache b/MinMax/obj/Debug/MinMax.csproj.AssemblyReference.cache
index 126ed02..58cdbeb 100644
Binary files a/MinMax/obj/Debug/MinMax.csproj.AssemblyReference.cache and b/MinMax/obj/Debug/MinMax.csproj.AssemblyReference.cache differ
diff --git a/RekurzivFaktorialis/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache b/RekurzivFaktorialis/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
index 9ffafb9..36b7f90 100644
Binary files a/RekurzivFaktorialis/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache and b/RekurzivFaktorialis/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache differ
diff --git a/Szamkitalalo/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache b/Szamkitalalo/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
index 1796b62..85ce0f8 100644
Binary files a/Szamkitalalo/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache and b/Szamkitalalo/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache differ
diff --git a/Szamkitalalo/obj/Debug/Szamkitalalo.csproj.AssemblyReference.cache b/Szamkitalalo/obj/Debug/Szamkitalalo.csproj.AssemblyReference.cache
index 126ed02..58cdbeb 100644
Binary files a/Szamkitalalo/obj/Debug/Szamkitalalo.csproj.AssemblyReference.cache and b/Szamkitalalo/obj/Debug/Szamkitalalo.csproj.AssemblyReference.cache differ
diff --git a/Szigetek/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache b/Szigetek/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
index e6ee101..ac8a7b9 100644
Binary files a/Szigetek/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache and b/Szigetek/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache differ
diff --git a/Szigetek/obj/Debug/Szigetek.csproj.AssemblyReference.cache b/Szigetek/obj/Debug/Szigetek.csproj.AssemblyReference.cache
index 204fdef..58cdbeb 100644
Binary files a/Szigetek/obj/Debug/Szigetek.csproj.AssemblyReference.cache and b/Szigetek/obj/Debug/Szigetek.csproj.AssemblyReference.cache differ
diff --git a/c-sharp.sln b/c-sharp.sln
index fb9a8ad..06a9f57 100644
--- a/c-sharp.sln
+++ b/c-sharp.sln
@@ -17,6 +17,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BuborekRendezes", "BuborekR
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RekurzivFaktorialis", "RekurzivFaktorialis\RekurzivFaktorialis.csproj", "{F7BEEB1C-EB73-42E8-A148-3DB8C96B8D56}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RegularExpressions", "RegularExpressions\RegularExpressions.csproj", "{B8063178-720E-430C-B364-DC3F1DFCE42C}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -51,6 +53,10 @@ Global
 		{F7BEEB1C-EB73-42E8-A148-3DB8C96B8D56}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{F7BEEB1C-EB73-42E8-A148-3DB8C96B8D56}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{F7BEEB1C-EB73-42E8-A148-3DB8C96B8D56}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B8063178-720E-430C-B364-DC3F1DFCE42C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B8063178-720E-430C-B364-DC3F1DFCE42C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B8063178-720E-430C-B364-DC3F1DFCE42C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B8063178-720E-430C-B364-DC3F1DFCE42C}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/c-sharp/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache b/c-sharp/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
index 2a7adbf..5a61f3e 100644
Binary files a/c-sharp/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache and b/c-sharp/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache differ
diff --git a/c-sharp/obj/Debug/c-sharp.csproj.AssemblyReference.cache b/c-sharp/obj/Debug/c-sharp.csproj.AssemblyReference.cache
index 126ed02..58cdbeb 100644
Binary files a/c-sharp/obj/Debug/c-sharp.csproj.AssemblyReference.cache and b/c-sharp/obj/Debug/c-sharp.csproj.AssemblyReference.cache differ