first of all,plz forgive my pool engilsh.
I’m currently studying the tcp receive programming.And while I’m using ReceiveAsync(Memory, SocketFlags, CancellationToken) method, I just receive nothing in the memory.

    public async Task BeginTcpRecieve()
    {
        try
        {   
            //ArraySegment<byte> bytes = new ArraySegment<byte>(tcpRecReserve,catchNum, tcpRecReserve.Length - catchNum);
            Memory<byte> memory = new Memory<byte>(tcpRecReserve, catchNum, tcpRecReserve.Length - catchNum);
            int reclen = await tcpSocket.ReceiveAsync(memory, SocketFlags.None);
            HandleReceive(reclen);
            await BeginTcpRecieve();
        }
        catch (SocketException e)
        {
            print(e.ErrorCode + "/" + e.Message); 
            isConnected= false;
        }
        
    }

However, it works well when i switch to ReceiveAsync(ArraySegment, SocketFlags) method.My question is why this happened and how can i solute it.