How to spawn a process and consume standard output and error without hanging

SpawnAndWait.cs

var process = Process.Start(processStartInfo);

var stdErr = process.StandardError;
var stdOut = process.StandardOutput;

var resultAwaiter = stdOut.ReadToEndAsync();
var errResultAwaiter = stdErr.ReadToEndAsync();

await process.WaitForExitAsync();

Task.WaitAll(resultAwaiter, errResultAwaiter);

var result = resultAwaiter.Result;
var errResult = errResultAwaiter.Result;