System.Net.ListenerClientCertAsyncResult.Reset C# (CSharp) Метод

        internal void Reset(uint size)
        {
            if (size == _size)
            {
                return;
            }
            if (_size != 0)
            {
                _boundHandle.FreeNativeOverlapped(_pOverlapped);
            }
            _size = size;
            if (size == 0)
            {
                _pOverlapped = null;
                _memoryBlob = null;
                _backingBuffer = null;
                return;
            }
            _backingBuffer = new byte[checked((int)size)];
            _pOverlapped = _boundHandle.AllocateNativeOverlapped(s_IOCallback, state: this, pinData: _backingBuffer);
            _memoryBlob = (Interop.HttpApi.HTTP_SSL_CLIENT_CERT_INFO*)Marshal.UnsafeAddrOfPinnedArrayElement(_backingBuffer, 0);
        }

        private unsafe ListenerClientCertAsyncResult AsyncProcessClientCertificate(AsyncCallback requestCallback, object state)
        {
            if (this.m_ClientCertState == ListenerClientCertState.InProgress)
            {
                throw new InvalidOperationException(SR.GetString("net_listener_callinprogress", new object[] { "GetClientCertificate()/BeginGetClientCertificate()" }));
            }
            this.m_ClientCertState = ListenerClientCertState.InProgress;
            this.HttpListenerContext.EnsureBoundHandle();
            ListenerClientCertAsyncResult result = null;

            if (this.m_SslStatus != SslStatus.Insecure)
            {
                uint size = 0x5dc;
                result = new ListenerClientCertAsyncResult(this, state, requestCallback, size);
                try
                {
                    uint num2;
Label_0058:
                    num2 = 0;
                    uint num3 = UnsafeNclNativeMethods.HttpApi.HttpReceiveClientCertificate(this.HttpListenerContext.RequestQueueHandle, this.m_ConnectionId, 0, result.RequestBlob, size, &num2, result.NativeOverlapped);
                    if (num3 == 0xea)
                    {
                        UnsafeNclNativeMethods.HttpApi.HTTP_SSL_CLIENT_CERT_INFO *requestBlob = result.RequestBlob;
                        size = num2 + requestBlob->CertEncodedSize;
                        result.Reset(size);
                        goto Label_0058;
                    }
                    if ((num3 != 0) && (num3 != 0x3e5))
                    {
                        throw new HttpListenerException((int)num3);
                    }
                    return(result);
                }
                catch
                {
                    if (result != null)
                    {
                        result.InternalCleanup();
                    }
                    throw;
                }
            }
            result = new ListenerClientCertAsyncResult(this, state, requestCallback, 0);
            result.InvokeCallback();
            return(result);
        }