Fix ObjectDisposedException: swap mre/watcher declaration order in BuildsWhileBuildIsRunningOnServer

Copilot · rainersigwald · Copilot · commit 643f608eee54 · 2026-03-02T20:11:39.000Z
Co-authored-by: rainersigwald &lt;3347530+rainersigwald@users.noreply.github.com&gt;
diff --git a/src/MSBuild.UnitTests/MSBuildServer_Tests.cs b/src/MSBuild.UnitTests/MSBuildServer_Tests.cs
@@ -190,8 +190,8 @@ public void BuildsWhileBuildIsRunningOnServer()
             _env.WithTransientProcess(pidOfServerProcess);
 
             string? dir = Path.GetDirectoryName(markerFile.Path);
-            using var watcher = new System.IO.FileSystemWatcher(dir!);
             using ManualResetEvent mre = new ManualResetEvent(false);
+            using var watcher = new System.IO.FileSystemWatcher(dir!);
             watcher.Created += (o, e) =>
             {
                 _output.WriteLine($"The marker file {markerFile.Path} was created. The build task has been started.");

Original file line number	Diff line number	Diff line change
`@@ -190,8 +190,8 @@ public void BuildsWhileBuildIsRunningOnServer()`
`190`	`190`	`_env.WithTransientProcess(pidOfServerProcess);`
`191`	`191`
`192`	`192`	`string? dir = Path.GetDirectoryName(markerFile.Path);`
`193`		`- using var watcher = new System.IO.FileSystemWatcher(dir!);`
`194`	`193`	`using ManualResetEvent mre = new ManualResetEvent(false);`
	`194`	`+ using var watcher = new System.IO.FileSystemWatcher(dir!);`
`195`	`195`	`watcher.Created += (o, e) =>`
`196`	`196`	`{`
`197`	`197`	`_output.WriteLine($"The marker file {markerFile.Path} was created. The build task has been started.");`