USE SQL COMMAND LIKE THIS :
SqlCommand cmd =new SqlCommand();
cmd.Connection = Your SQLCONNECTION;
cmd.CommandText = "Set Identity_Insert TABLENAME ON;
INsert into TABLENAME (Pro_Comp_ID,Pro_ID,Comp_ID) values (' VALUE1','VALUE2 ','VALUE3 ')
Set Identity_Insert EmployeesTimes OFF";
cmd.ExecuteNonQuery();