string request = string.Empty;
using(System.Diagnostics.Process process = new System.Diagnostics.Process())
{
process.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
process.StartInfo.FileName = "cmd.exe";
process.StartInfo.Arguments = "/C wmic os get osarchitecture";
process.StartInfo.UseShellExecute = false;
process.StartInfo.CreateNoWindow = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.RedirectStandardInput = true;
process.Start();
while(!process.HasExited)
{
//сохранили ответ cmd
request += process.StandardOutput.ReadToEnd();
}
}