[c#] Can't find System.Windows.Media namespace?

I'm using an object from a 3rd party API that has a property of type System.Windows.Media.ImageSource, yet I can't seem to find the System.Windows.Media namespace anywhere. If I try to add a reference to my project I don't see System.Windows.Media in the list of options. My project is also targeting .Net 3.5.

Is there something else I need to do to be able to access this namespace?

You should add reference to PresentationCore.dll.

You can add PresentationCore.dll more conveniently by editing the project file. Add the following code into your csproj file:

<ItemGroup>
   <FrameworkReference Include="Microsoft.WindowsDesktop.App" />
</ItemGroup>

In your solution explorer, you now should see this framework listed, now. With that, you then can also refer to the classes provided by PresentationCore.dll.

Add PresentationCore.dll to your references. This dll url in my pc - C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\PresentationCore.dll

For Visual Studio 2017

Find "References" in Solution explorer

Right click "References"

Choose "Add Reference..."

Find "Presentation.Core" list and check checkbox

Click OK