How Can I Capture and Display Live Console Output from a .NET Application?

Real-time Console Output Capture in .NET Applications

This example shows how to capture and display the output of a console application within a .NET application in real time.

using System.Diagnostics;

namespace RealtimeConsoleOutput
{
    class Program
    {
        static void Main(string[] args)
        {
            // Initiate the process for the console application.
            Process consoleApp = new Process();

            // Configure process settings.
            consoleApp.StartInfo.FileName = "csc.exe"; // Assumes 'csc.exe' is in the system PATH
            consoleApp.StartInfo.Arguments = "/r:System.dll /out:sample.exe stdstr.cs";
            consoleApp.StartInfo.UseShellExecute = false;
            consoleApp.StartInfo.RedirectStandardOutput = true;

            // Begin the process.
            consoleApp.Start();

            // Continuously read and display output.
            while (!consoleApp.StandardOutput.EndOfStream)
            {
                string line = consoleApp.StandardOutput.ReadLine();
                if (!string.IsNullOrEmpty(line)) // added null check for robustness
                    Console.WriteLine(line);
            }

            // Wait for the console application to finish.
            consoleApp.WaitForExit();
        }
    }
}

Detailed Explanation:

• ProcessStartInfo.RedirectStandardOutput = true: This redirects the console application's standard output to the .NET application.
• The while loop continuously reads lines from consoleApp.StandardOutput and displays them using Console.WriteLine(). The addition of a null check improves the code's robustness.
• consoleApp.StandardOutput.EndOfStream: This checks if all output has been received.
• consoleApp.WaitForExit(): This ensures the .NET application waits for the console application's completion.

For comprehensive output capture, consider redirecting the standard error stream using RedirectStandardError = true.

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