Sample Code for Exception based logging with .NET SDK using C#

//Set the URL
context.SoapApiServerUrl = 'https://api.sandbox.ebay.com/wsapi'; 

//Set the version
context.Version = '485';

//API Error codes for logging
StringCollection errorCodes = new StringCollection();
errorCodes.Add('10007'); // Internal error to the application
errorCodes.Add('931'); // Invalid Token Error 

//Http Status Codes for logging

Int32Collection httpCodes = new Int32Collection();

httpCodes.Add(404);

httpCodes.Add(502);

httpCodes.Add(500);

//Trigger Exceptions for logging

TypeCollection exceptions = new TypeCollection();

exceptions.Add(typeof(System.Net.ProtocolViolationException));

exceptions.Add(typeof(System.InvalidOperationException));

//Create the Exception Filter

ExceptionFilter exFilter = new ExceptionFilter();

exFilter.TriggerErrorCodes = errorCodes;

exFilter.TriggerExceptions = exceptions;

exFilter.TriggerHttpStatusCodes = httpCodes;

// Set logging
Context.ApiLogManager = newApiLogManager();
context.ApiLogManager.ApiLoggerList.Add(new eBay.Service.Util.FileLogger('Messages.log', true, true, true));
context.ApiLogManager.EnableLogging = true;

//Set the filter to log messages only for specified errors / exceptions
context.ApiLogManager.MessageLoggingFilter = exFilter;