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As I know, Point are exist in namespace System.Drawing , but Visual Studio can't find it.

using System.Drawing;
class Flower
    public Point Location { get; private set; }
Error: Can't find name of type or namespace "Point"
Edit 1:
.Net 4.5.1
                what .NET Framework are you using? Also did you try to add the assembly reference to System.Drawing.dll?
– Ahmed ilyas
                Mar 14, 2014 at 23:32
                Yes, it works, thanks. I'll upvote it in a few minutes of the technical reason. But why I should do it by hands. I thought, that when I write using System.Drawing, it must work without additional configuration.
– Amazing User
                Mar 14, 2014 at 23:45
                I can have MyNamespace.MyType in an assembly that's installed, but unless that assembly is references, I can't use it. Some framework assemblies are added by default for convenience.
– jdphenix
                Mar 14, 2014 at 23:47
As others have indicated, you are missing a reference to System.Drawing in your project.  The reason this works in some project types and not others is that some project types, specifically Windows Forms projects, will automatically add the reference to System.Drawing for you.  While  other project types like Console App, Class Library, or WPF Application do not automatically have that reference, so you have to manually add it.
        
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