How Refresh excel sheet automatic by machine in c# Coding

Question

I want to refresh Excel sheet automatic acording to my requirment..
when more time active an excel sheet then this error become:---{ Call was rejected by callee. (Exception from HRESULT: 0x80010001 (RPC_E_CALL_REJECTED))}.
Task Manager Processes show there have more EXCEL.EXE is running....
I use Process...
System.Diagnostics.Process[] ExcelPro = System.Diagnostics.Process.GetProcesses()
That help kill the Process but after some time become same Error.
Please its urgent give me answer............