namespace Microsoft.Diagnostics.Runtime.Utilities
{
    public abstract class COMHelper
    {
        [UnmanagedFunctionPointer(CallingConvention.Winapi)]
        protected delegate int QueryInterfaceDelegate(IntPtr self, in Guid guid, out IntPtr ptr);
        {
            public virtual int EndInvoke(in Guid guid, out IntPtr ptr, IAsyncResult result);
        }
    }
}