private async Task <(uint messageType, uint requestHandle, byte[] content)> SendAndReceiveAsync(IConversation sender, IConversation receiver, uint messageType, uint handle, byte[] content)
{
using var input = new MemoryStream();
using var transfer = new MemoryStream();
using var output = new MemoryStream();
// write message into the body stream
input.Write(content);
input.Position = 0;
// encrypt the message into the transfer stream
await sender.EncryptMessageAsync(input, messageType, handle, transfer.WriteAsync, default);
transfer.Position = 0;
// dencrypt the message from the transfer stream
var ret = await receiver.DecryptMessageAsync(output, transfer.ReadAsync, default);
return(ret.messageType, ret.requestHandle, output.ToArray());
}