用vb.net写的点对点文件传送程序，测试成功-Point to point with vb.net write file transfer program, the test is successful

本demo是在ESFramework.Demos.FileTransfer的基础之上，增加了P2P通信的功能。客户端之间如果P2P通道创建成功，则它们之间的消息将直接使用P2P通道传送。-This demo is in ESFramework.Demos.FileTransfer the basis, increasing the P2P communication function. P2P channel successfully created between the client, th