Why bcp query not work in the c#? : I'm beginner in c#,i want use the bcp utilities in c#,write this code:<br/>

    string connstr = "Data Source=192.168.50.172;Initial Catalog=CDRDB;User ID=CDRLOGIN;Password=beh1368421";
                    //string connstr = "Enter your connection string here";
                        System.Diagnostics.Process proc = new System.Diagnostics.Process();
                        proc.StartInfo.FileName = "bcp";
                        proc.StartInfo.Arguments = @"select * from CDRTABLE"" queryout c:\filename.csv -S 192.168.50.172 -U CDRLOGIN -P beh1368421 -f -w";
                        proc.Start();
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that's code run but ,`filename.csv` not create in my c drive,what happen?how can i solve that problem?