Get Callback From Custom Attribute Tagged Functions [C#]

Question

I have a custom attribute that can be applied to methods. How would I go about getting a callback when a tagged function is called?

class RPC : Attribute
{
    private string RPCName;

    public RPC (string RPCName)
    {

        this.RPCName = RPCName;
    }
}

How would I go about knowing when such a function is called:

[RPC("shoot")]
    public static void shoot(int testParameter)
    {
        Console.WriteLine("Shoot was called.");

    }