vb.net - How to get Output of a Command Prompt Window line by line in Visual Basic?

Question

I am trying to get a command line output line by line till the end of the output but I am not able to do so. I am using it in my Form and this code executes on click of a button.
Can you tell me whats wrong with my code?

Dim proc As ProcessStartInfo = New ProcessStartInfo("cmd.exe")
    Dim pr As Process
    proc.CreateNoWindow = True
    proc.UseShellExecute = False
    proc.RedirectStandardInput = True
    proc.RedirectStandardOutput = True
    pr = Process.Start(proc)
    pr.StandardInput.WriteLine("cd C:sdkplatform-tools")
    pr.StandardInput.WriteLine("adb help")
    Dim helpArray(20) as String
    For i as Integer 1 To 7
    helpArray(i) = pr.StandardOutput.ReadLine()
    Next
    pr.StandardOutput.Close()

The program stops responding when this code is executed.

Answer 1

I've done some research. adb help writes output into STDERR. So you need something like:

    Dim proc As ProcessStartInfo = New ProcessStartInfo("cmd.exe")
    Dim pr As Process
    proc.CreateNoWindow = True
    proc.UseShellExecute = False
    proc.RedirectStandardInput = True
    proc.RedirectStandardOutput = True
    pr = Process.Start(proc)
    pr.StandardInput.WriteLine("C:sdkplatform-tools")
    pr.StandardInput.WriteLine("adb help 2>&1")
    pr.StandardInput.Close()
    Console.WriteLine(pr.StandardOutput.ReadToEnd())
    pr.StandardOutput.Close()

to catch it.
You need no 2>&1 if you call ipconfig, for example.