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README.md

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- ![Logo](images/logo/png/SS-NET-icon-h50.png) SSH.NET
+ ![Logo](https://raw.githubusercontent.com/sshnet/SSH.NET/develop/images/logo/png/SS-NET-icon-h50.png) SSH.NET
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 SSH.NET is a Secure Shell (SSH-2) library for .NET, optimized for parallelism.