Update dotnet_ecosystem.md

Author: Happypig375

_snippets/dotnet_ecosystem.md

@@ -17,6 +17,7 @@ code: |
     image.Mutate(_.Resize(300, 200).Flip(FlipMode.Horizontal ||| FlipMode.Vertical) >> ignore)
     image.Save "output.jpg"
     ---
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 ## Full access to .NET ecosystem
 
 F# has seamless .NET integration which lets you work with existing .NET libraries and frameworks. Anything written in C# can be used from F# and vice versa.