[Serializable]
[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class | AttributeTargets.Assembly,
                AllowMultiple = false)]
[MulticastAttributeUsage(MulticastTargets.Method)]
public class InjectLatencyAttribute : OnMethodBoundaryAspect
{
    Random random = new Random((int)DateTime.UtcNow.Ticks);

    public override void OnEntry(MethodExecutionArgs args)
    {
        // you need a mechanism to turn latency injection, preferably via a
        // configuration mechanism that allows you to update on the fly
        if (LatencyInjectionConfig.Enabled)
        {
            var lagSeconds = random.Next(LatencyInjectionConfig.MaxLatencyLagSeconds);
            var latencyLag = TimeSpan.FromSeconds(lagSeconds);
            Thread.Sleep(latencyLag);
        }

        // execute the underlying method
        base.OnEntry(args);
    }
}