Redirect Console Output in C#

Those of you that know me know that I love a good console application. I use them all the time for samples and prototypes. Sometimes it’s nice to capture the output from a console application to share with others.

It’s remarkably simple to accomplish this with the .NET Framework. There is a static method Console.SetOut that accepts a TextWriter. Redirecting output from your console application is as simple as creating a TextWriter and calling that method.

Here’s a quick example (taken directly from MSDN):

Console.WriteLine("Hello World");
FileStream fs = new FileStream("Test.txt", FileMode.Create);
// First, save the standard output.
TextWriter tmp = Console.Out;
StreamWriter sw = new StreamWriter(fs);
Console.SetOut(sw);
Console.WriteLine("Hello file");
Console.SetOut(tmp);
Console.WriteLine("Hello World");
sw.Close();
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