service-bus-extensions.cs

public static class ServiceBusMessageExtensions
{
    public const string RetryCountIdentifier = "RetryAttempt";

    public static bool ShouldRetry(this Message message, int maxRetryCount)
    {
        int resubmitCount = message.GetRetryAttempt();

        return resubmitCount < maxRetryCount;
    }

    public static void IncreaseRetryAttempt(this Message message)
    {
        int retryCount = message.GetRetryAttempt();

        message.UserProperties[RetryCountIdentifier] = retryCount + 1;
    }

    public static int GetRetryAttempt(this Message message)
    {
        return message.UserProperties.ContainsKey(RetryCountIdentifier) ? (int)message.UserProperties[RetryCountIdentifier] : 0;
    }
}