namespace System.ServiceModel
{
    public abstract class ClientBase<TChannel> : IAsyncDisposable, IDisposable, ICommunicationObject
        where TChannel, class
    {
        protected delegate object[] EndOperationDelegate(IAsyncResult result);
        {
            public virtual IAsyncResult BeginInvoke(IAsyncResult result, AsyncCallback callback, object object);
        }
    }
}