How to call a stored proc with parameters in C#

CallSproc.cs

//Useful for SSIS Script Tasks

SqlConnection conn;
SqlCommand comm;
String logMessage = "";

try
{
	Dts.VariableDispenser.GetVariables(ref vars);
	
	logMessage = String.Format("Hello world");
	
	conn = (SqlConnection)Dts.Connections["ADONET.SystemLog"].AcquireConnection(null);                
	comm = new SqlCommand("[dbo].[usp_AppLogInsInfo]", conn);
	comm.CommandType = CommandType.StoredProcedure;
	comm.Parameters.AddWithValue("@ProcessID", vars["User::ProcessID"].Value.ToString());
	comm.Parameters.AddWithValue("@Subsystem", vars["User::Subsystem"].Value.ToString());
	comm.Parameters.AddWithValue("@LogMessage", logMessage);                
	comm.ExecuteNonQuery();
                
	logMessage = "Truncating tables";
	comm = new SqlCommand("[dbo].[usp_Logger]", conn);
	comm.CommandType = CommandType.StoredProcedure;
	comm.Parameters.AddWithValue("@ProcessID", vars["User::ProcessID"].Value.ToString());
	comm.Parameters.AddWithValue("@Subsystem", vars["User::Subsystem"].Value.ToString());
	comm.Parameters.AddWithValue("@LogMessage", logMessage);
	comm.ExecuteNonQuery();

	Dts.TaskResult = (int)ScriptResults.Success;
}
catch (Exception ex)
{
	Dts.Events.FireError(0, "Script Task Example", ex.Message + "\r" + ex.StackTrace, String.Empty, 0);
	Dts.TaskResult = (int)ScriptResults.Failure;
}
finally
{
	vars.Unlock();
}