Simplify Tower (C#) folder structure

90_Tower/csharp/Tower.sln

@@ -1,34 +1,25 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.26124.0
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.32014.148
 MinimumVisualStudioVersion = 15.0.26124.0
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Tower", "tower\Tower.csproj", "{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Tower", "Tower.csproj", "{EEED33AD-3DE2-49AA-8AF1-2174C510E128}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
-		Debug|x64 = Debug|x64
-		Debug|x86 = Debug|x86
 		Release|Any CPU = Release|Any CPU
-		Release|x64 = Release|x64
-		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{EEED33AD-3DE2-49AA-8AF1-2174C510E128}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EEED33AD-3DE2-49AA-8AF1-2174C510E128}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EEED33AD-3DE2-49AA-8AF1-2174C510E128}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EEED33AD-3DE2-49AA-8AF1-2174C510E128}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Debug|x64.ActiveCfg = Debug|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Debug|x64.Build.0 = Debug|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Debug|x86.Build.0 = Debug|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Release|Any CPU.Build.0 = Release|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Release|x64.ActiveCfg = Release|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Release|x64.Build.0 = Release|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Release|x86.ActiveCfg = Release|Any CPU
-		{2E14FCD5-A52C-4292-A7F4-0C7E5780C962}.Release|x86.Build.0 = Release|Any CPU
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {BDCB8278-62ED-46E3-92C2-FF572E0E3ED3}
 	EndGlobalSection
 EndGlobal