Exception when reading output of process - c++

Question

my problem is the following:
I have a UI created in Visual Studio with C++/CLI.
Now I have a button event that creates a process which runs a C++ Console Application with Parameters.
This works fine, the console application gets executed with parameters with no errors and im also seeing the console window with the right output.
But I still get an exception:
StandardOut has not been redirected or the process hasn't started yet.
I think this has something to do with the Streamreader and some DataReceivedEvents but I have no clue.
This is my code:
try {
String^ parameters = tbLoadXML->Text + " " + tbNumberAnts->Text + " " + tbIteration->Text + " " + tbReduction->Text + " " + tbPheromoneDeposit->Text + " " + tbPheromoneReduction->Text + " " + tbAlpha->Text + " " + tbBeta->Text + " " + reduce.ToString() + " " + algorithm.ToString() + " " + probabilityalgorithm.ToString() + " " + numbercities.ToString();
Process^ process = gcnew Process();
process->StartInfo->UseShellExecute = false;
process->StartInfo->CreateNoWindow = true;
process->StartInfo->RedirectStandardOutput = true;
process->Start("TSPACO.exe", parameters);
StreamReader^ reader = process->StandardOutput;
String^ output = reader->ReadToEnd();
textBox1->Text += output;
process->WaitForExit();
process->Close();
}
catch (Exception^ ex) {
MessageBox::Show(ex->Message);
}
I also tried a while-loop:
while (!process->StandardOutput->EndOfStream)
{
textBox1->Text += process->StandardOutput->ReadLine();
}
But nothing really works - I have no idea why.

Answer 1

So I figured out a solution for my problem - I have no clue why this works but I think the trick is to create a ProcessStartInfo-Object with all the needed properties and then just use the default method of Process::Start without any parameters:
ProcessStartInfo^ startInfo = gcnew ProcessStartInfo();
startInfo->FileName = "TSPACO.exe";
startInfo->Arguments = parameters;
startInfo->UseShellExecute = false;
startInfo->CreateNoWindow = true;
startInfo->RedirectStandardOutput = true;
Process^ process = gcnew Process();
process->StartInfo = startInfo;
process->Start();
StreamReader^ reader = process->StandardOutput;
String^ output = reader->ReadToEnd();
textBox1->Text += output;
process->WaitForExit();
process->Close();