c# - How to use System.Windows in Mono / MonoDevelop? -

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i'm trying use rect structure system.windows in monodevelop, can't find system.windows in packages list when try add reference it. there lots of things system.windows.controls.... , system.windows.forms... not system.windows itself. how access rect in monodevelop?

the rect structure defined in windowsbase.dll (if targetting .net 4). need add reference assembly access it.


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