Record error messages to Windows logs

Introduction:
It is impossible for any system to run without errors once and for all. The error handling of an excellent system must be excellent, a good programmer will also pay close attention to possible errors and handle fault tolerance accordingly. Try catch in C # saves a lot of trouble for us. This article does not discuss how to handle errors, but provides a collection of error information, and store the error information in Windows logs.
I. Processing code:
Using System;
Using System. Diagnostics;
Using System. Text;
Using System. IO;

Namespace Town. Log
{
/// <Summary>
/// Function: error log class, which records error information in system logs according to the specified event log name
/// </Summary>
Public class Error
{
/// <Summary>
/// Record logs
/// </Summary>
/// <Param name = "sourceName"> Log resource name, for example, Town </param>
/// <Param name = "message"> error message </param>
Public static void Log (string sourceName, string message)
{
EventLog eventLog = null;

// Determine whether the log exists
If (! (EventLog. SourceExists (sourceName )))
{
EventLog. CreateEventSource (sourceName, sourceName + "Log ");
}

If (eventLog = null)
{
EventLog = new EventLog (sourceName + "Log ");
EventLog. Source = sourceName;
}

// Record log information
EventLog. WriteEntry (message, System. Diagnostics. EventLogEntryType. Error );