Add README.md

WaveshareUARTFingerprintSensor.Sample/README.md

@@ -0,0 +1,22 @@
+# Sample App
+
+A sample app for the [Waveshare UART fingerprint sensor (C) library](../README.md)
+
+![Sample](../Sample.png)
+
+## Build
+
+You can compile it using any **C# IDE** that supports **.Net Framework** or by running
+`dotnet build` in a **terminal** using [**.Net CLI**](https://docs.microsoft.com/en-us/dotnet/core/tools/)
+
+## Usage
+
+- Install [**Mono**](https://www.mono-project.com/) on your Raspberry Pi
+- [**Download**](https://github.com/Eveldee/WaveshareUARTFingerprintSensor/releases) or [**Build**](#build) the application
+- Run it with `mono WaveshareUARTFingerprintSensor.Sample.exe`
+
+## Copyright and license
+
+*[**WaveshareUARTFingerprintSensor**](../README.md)* library is licensed under the [MIT License](../LICENSE).
+
+*[**gui.cs**](https://github.com/migueldeicaza/gui.cs/)* library is under the [MIT License](https://github.com/migueldeicaza/gui.cs/blob/master/LICENSE).