Update README.md

Author: Fe-Bell

README.md

@@ -3,6 +3,8 @@ Simple database handler based on XML serialization and reflection.
 
 This is a simple project that aims for C#/.NET beginners to achieve database functionality in their applications. The project is written for .NET Standard 2.0, which is compatible with .NET Core 2.0+ and .NET Framework 4.6.1+.
 
+ReflectXMLDB is cross platform and can run in Windows, Linux and MacOS operating systems that support the .Net Core initiative.
+
 # Get started
 Download ReflectXMLDB from our [nuget](https://www.nuget.org/packages/ReflectXMLDB/) links.