VS: Fix CSharp sources inside build directory

Fixes: #22104

Source/cmVisualStudio10TargetGenerator.cxx

@@ -5037,7 +5037,9 @@ std::string cmVisualStudio10TargetGenerator::GetCSharpSourceLink(
 {
   // For out of source files, we first check if a matching source group
   // for this file exists, otherwise we check if the path relative to current
-  // source- or binary-dir is used within the link and return that
+  // source- or binary-dir is used within the link and return that.
+  // In case of .cs files we can't do that automatically for files in the
+  // binary directory, because this leads to compilation errors.
   std::string link;
   std::string sourceGroupedFile;
   std::string const& fullFileName = source->GetFullPath();
@@ -5059,7 +5061,8 @@ std::string cmVisualStudio10TargetGenerator::GetCSharpSourceLink(
     link = sourceGroupedFile;
   } else if (cmHasPrefix(fullFileName, srcDir)) {
     link = fullFileName.substr(srcDir.length() + 1);
-  } else if (cmHasPrefix(fullFileName, binDir)) {
+  } else if (!cmHasSuffix(fullFileName, ".cs") &&
+             cmHasPrefix(fullFileName, binDir)) {
     link = fullFileName.substr(binDir.length() + 1);
   } else if (cmProp l = source->GetProperty("VS_CSHARP_Link")) {
     link = *l;

Tests/RunCMake/VS10Project/CSharpSourceGroup/cmake/AssemblyInfo.cs.in

@@ -0,0 +1,18 @@
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Windows;
+
+//General Information about an assembly is controlled through the following
+//set of attributes. Change these attribute values to modify the information
+//associated with an assembly.
+
+[assembly: AssemblyTitle("")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("")]
+[assembly: AssemblyCopyright("")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

Tests/RunCMake/VS10Project/VsCsharpSourceGroup-check.cmake

@@ -13,6 +13,7 @@ set(SOURCE_GROUPS_TO_FIND
   "CSharpSourceGroup\\\\nested\\\\baz\\.cs"
   "CSharpSourceGroup\\\\images\\\\empty\\.bmp"
   "VsCsharpSourceGroup\\.png"
+  "AssemblyInfo\\.cs"
 )
 
 foreach(GROUP_NAME IN LISTS SOURCE_GROUPS_TO_FIND)

Tests/RunCMake/VS10Project/VsCsharpSourceGroup.cmake

@@ -20,3 +20,11 @@ add_library(VsCsharpSourceGroup SHARED ${SRC_FILES} ${IMAGE_FILES} ${RESOURCE_FI
 source_group("CSharpSourceGroup" FILES ${CMAKE_CURRENT_SOURCE_DIR}/CSharpSourceGroup/foo.cs)
 source_group("CSharpSourceGroup/nested" FILES ${CMAKE_CURRENT_SOURCE_DIR}/CSharpSourceGroup/nested/baz.cs)
 source_group("Images" FILES ${IMAGE_FILES})
+
+# Test covering CMake Issue 22104.
+# Basically there should not be any link tags for files in the binary directory.
+include(CSharpUtilities)
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/CSharpSourceGroup/cmake/AssemblyInfo.cs.in" "Properties/AssemblyInfo.cs")
+
+target_sources(VsCsharpSourceGroup PRIVATE "Properties/AssemblyInfo.cs")
+csharp_set_designer_cs_properties("Properties/AssemblyInfo.cs")