I googling and have tried below ways to achieve this,
1, mailto:
2, Registrykeys - @"HKEY_CLASSES_ROOT\mailto\shell\open\command", "", "none");
3, proc.StartInfo.FileName = string.Format("\"{0}\"", Process.GetProcessesByName("OUTLOOK")[0].Modules[0].FileName);
But this always returns outlook window only. But I want to open default mail client window which is from our device like Google chrome, MAIL Live window,OUTLOOK
Attached Images for your reference.
Please share your answers,