c# - How does the recursive GetEndpoints-Method of the OPC/UA-.NETStandard work?

Question

I wanted to learn some C# and .net and network stuff. Thus, I've chosen the OPC UA code.

On github: UA-.NETStandard/Stack/Opc.Ua.Core/Stack/Client/DiscoveryClient.cs

But I really don't understand how this method works:

    public virtual EndpointDescriptionCollection GetEndpoints(StringCollection profileUris)
    {
        EndpointDescriptionCollection endpoints = null;

        GetEndpoints(
            null,
            this.Endpoint.EndpointUrl,
            null,
            profileUris,
            out endpoints);

        return PatchEndpointUrls(endpoints);
    }

I understand that it is a recursive method, calling itself over and over again.

1. How does it ever end? Is it maybe a continuous polling?
2. Is the inner call's argument(s) "null,this.Endpoint.EndpointUrl,null,profileUris,out endpoints" a StringCollection? Because the StringCollection "profileUris" is already a StringCollection!?

question from:https://stackoverflow.com/questions/65934017/how-does-the-recursive-getendpoints-method-of-the-opc-ua-netstandard-work

Answer 1

The method is not actually recursive. You're calling a different method(or "overload") altogether. You can check it out in the code repo.

Note that the class is partial. If you follow the references from the repo, you'll see that it leads to the generated client and server partial classes.