Adding upstream version 2:9.1.1230.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

runtime/compiler/dotnet.vim

@@ -0,0 +1,36 @@
+" Vim compiler file
+" Compiler:            dotnet build (.NET CLI)
+" Maintainer:          Nick Jensen <nickspoon@gmail.com>
+" Last Change:         2022-12-06
+"                      2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
+" License:             Vim (see :h license)
+" Repository:          https://github.com/nickspoons/vim-cs
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "dotnet"
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+if get(g:, "dotnet_errors_only", v:false)
+  CompilerSet makeprg=dotnet\ build\ -nologo
+		     \\ -consoleloggerparameters:NoSummary
+		     \\ -consoleloggerparameters:ErrorsOnly
+else
+  CompilerSet makeprg=dotnet\ build\ -nologo\ -consoleloggerparameters:NoSummary
+endif
+
+if get(g:, "dotnet_show_project_file", v:true)
+  CompilerSet errorformat=%E%f(%l\\,%c):\ %trror\ %m,
+			 \%W%f(%l\\,%c):\ %tarning\ %m,
+			 \%-G%.%#
+else
+  CompilerSet errorformat=%E%f(%l\\,%c):\ %trror\ %m\ [%.%#],
+			 \%W%f(%l\\,%c):\ %tarning\ %m\ [%.%#],
+			 \%-G%.%#
+endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save