Question

In C#, currently i’m doing the following code to filter out a specific set of classes that inherit from the CaptureType that is passed to the method.

    public static CaptureType[] ListPluginsWith<CaptureType>()
    {
        List<CaptureType> plugins = new List<CaptureType>();
        foreach (var plugin in Bot.AutoPlugins)
        {
            CaptureType plug;
            try
            {
                if ((plug = (CaptureType)plugin.Interface) != null)
                {
                    plugins.Add(plug);
                }
            }
            catch
            {
                //doesn't inherit
            }
        }
        return plugins.ToArray();
    }

is there a more efficient/better/faster way to do this? if so, please let me know 🙂

Answer 1

if (plugin.Interface is CaptureType)
{
    // inherits
}

or even

return Bot.AutoPlugins.Where(i => i.Interface is CaptureType).ToArray();

UPD: if CaptureType is strongly required to be returned:

return Bot.AutoPlugins.Where(i => i.Interface is CaptureType)
                      .Select(i => i as CaptureType)
                      .ToArray();

(yes, now it looks a little more bloated, but there is another laconic answer with OfType() in this thread, so i will not repeat it)