How to run command SQLLoader Oracle in c#

Hello,

How to run command SQLLoader Oracle in c#. I try my sourcode for run this SQLLoader, but nothing happen and error "No process is associated with this object.". Please tell me how i fix it. Thanks.
This is my code:

System.Diagnostics.Process process1;
process1 = new System.Diagnostics.Process();
process1.EnableRaisingEvents = false;

string strCmdLine;
strCmdLine = @"/C SQLLDR XL/secreat@O11G CONTROL=E:\APT\LoadXL.ctl";
System.Diagnostics.Process.Start("CMD.exe", strCmdLine);
process1.WaitForExit();
process1.Close();