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Fix Windows process group example: CTRL_BREAK_EVENT, not CTRL_C_EVENT #53564

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Fix Windows process group example: CTRL_BREAK_EVENT, not CTRL_C_EVENT #53564

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Copilot May 5, 2026
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Fix ProcessGroup example: use CTRL_BREAK_EVENT instead of CTRL_C_EVEN…
Copilot May 5, 2026
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11 changes: 6 additions & 5 deletions docs/core/whats-new/dotnet-10/snippets/csharp/ProcessGroup.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -21,26 +21,27 @@ static void Main(string[] args)
using Process process = Process.Start(psi)!;
Thread.Sleep(5_000);

GenerateConsoleCtrlEvent(CTRL_C_EVENT, (uint)process.Id);
GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT, (uint)process.Id);
process.WaitForExit();

Console.WriteLine("Child process terminated gracefully, continue with the parent process logic if needed.");
}
else
{
// If you need to send a CTRL+C, the child process needs to re-enable CTRL+C handling, if you own the code, you can call SetConsoleCtrlHandler(NULL, FALSE).
// CREATE_NEW_PROCESS_GROUP disables CTRL+C handling in the new process group.
// CTRL+BREAK is not affected, so you don't need to re-enable it with SetConsoleCtrlHandler.
// If you use CTRL+C instead, re-enable handling by calling SetConsoleCtrlHandler(NULL, FALSE).
// see https://learn.microsoft.com/windows/win32/api/processthreadsapi/nf-processthreadsapi-createprocessw#remarks
SetConsoleCtrlHandler((IntPtr)null, false);

Console.WriteLine("Greetings from the child process! I need to be gracefully terminated, send me a signal!");

bool stop = false;

var registration = PosixSignalRegistration.Create(PosixSignal.SIGINT, ctx =>
var registration = PosixSignalRegistration.Create(PosixSignal.SIGQUIT, ctx =>
{
stop = true;
ctx.Cancel = true;
Console.WriteLine("Received CTRL+C, stopping...");
Console.WriteLine("Received CTRL+BREAK, stopping...");
});

StreamWriter sw = File.AppendText("log.txt");
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