throttling to limit throughput

Question

So right now I'm trying to figure out how to solve this issue. I need to call an external resource (API) and pass to it an object collection.

So lets say, I have a sender like this:

public class Sender{

    /// Send an message to an external api
    public async Task Send(object[] objectCollection){
    
    }
}

To problem is, there is a throughput limit on the API side. For example (5 objects per second). So I need to implement some kind of a waiting mechanism on my side(throttler) that will work with concurrent method calls inside a single APP.

1. Is there a .NET throttler already or do I have to implement it myself?
2. How would you implement the 5 objects per second rule?

My idea was to simply use an semaphore but that would only limit the concurrency and not account for the time limit.

Thanks for suggestions.

Answer 1

So in the end, I used window sliding technique.