Sql deadlock handler

With.cs

public class With
{
	const int SqlDeadlockErrorNumber = 1205;
	const int RetryLimit = 10;
	public static T DeadlockRetry<T>(Func<T> thingToTry)
	{
		var lastError = new Exception("Unknown state");
		for (int i = 0; i < RetryLimit; i++)
		{
			try
			{
				return thingToTry();
			}
			catch (SqlException error)
			{
				if (error.Number != SqlDeadlockErrorNumber) throw;
				lastError = error;
			}
		}
		throw lastError;
	}
}