VS: Revert "Add missing label in C# project-build events"

Revert commit b284a21fee (VS: Add missing label in C# project-build
events, 2021-09-03, v3.22.0-rc1~156^2).  The change broke cases using
multiple successful custom commands.  Revert it pending further
investigation into the interaction of the generated script code with
`Microsoft.Common.CurrentVersion.targets`, and whether this is needed
for all managed projects or just C# projects.

Also add a test covering the case that was broken.

Fixes: #22964
Issue: #21440

2 files changed, 19 insertions, 0 deletions

diff --git a/Tests/VSManagedCustomCommand/CMakeLists.txt b/Tests/VSManagedCustomCommand/CMakeLists.txt
new file mode 100644
index 0000000..2228875
--- /dev/null
+++ b/Tests/VSManagedCustomCommand/CMakeLists.txt
@@ -0,0 +1,15 @@
+cmake_minimum_required(VERSION 3.20)
+project(VSManagedCustomCommand CXX)
+
+add_custom_command(OUTPUT middle.txt
+  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/example.txt ${CMAKE_CURRENT_BINARY_DIR}/middle.txt
+  DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/example.txt
+  )
+
+add_custom_command(OUTPUT example.cxx
+  COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/middle.txt ${CMAKE_CURRENT_BINARY_DIR}/example.cxx
+  DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/middle.txt
+  )
+
+add_library(example SHARED example.cxx)
+set_property(TARGET example PROPERTY COMMON_LANGUAGE_RUNTIME "")
diff --git a/Tests/VSManagedCustomCommand/example.txt b/Tests/VSManagedCustomCommand/example.txt
new file mode 100644
index 0000000..05f95f1
--- /dev/null
+++ b/Tests/VSManagedCustomCommand/example.txt
@@ -0,0 +1,4 @@
+__declspec(dllexport) int example()
+{
+  return 0;
+}