private static SafeNativeMemory PackAuthenticationBuffer(NetworkCredential credential)
{
var userName = credential.Maybe().Return(c => c.UserName);
if (string.IsNullOrEmpty(userName))
return new SafeNativeMemory();
var inCredSize = 0;
NativeMethods.CredPackAuthenticationBuffer(0, userName, string.Empty, IntPtr.Zero, ref inCredSize);
var buffer = new SafeNativeMemory(inCredSize);
NativeMethods.CredPackAuthenticationBuffer(0, userName, string.Empty, buffer.DangerousGetHandle(), ref inCredSize);
return buffer;
}