How to turn SLR of for a given exception type

CustomRetryPolicy.cs

public class ChangeRetryPolicy : INeedInitialization
{
    public void Init()
    {
        SecondLevelRetries.RetryPolicy = (tm) =>
        {
            // retry max 3 times
            if (TransportMessageHelpers.GetNumberOfRetries(tm) >= 3)
            {
                // To send back a value less than zero tells the 
                // SecondLevelRetry satellite not to retry this message
                // anymore.
                return TimeSpan.MinValue;
            }



            if (tm.Headers["NServiceBus.ExceptionInfo.ExceptionType"] == typeof(MyBusinessException).FullName)
                return TimeSpan.MinValue;


            return TimeSpan.FromSeconds(5);
        };
    }
}