c# Where can find System.Windows.Controls.dll

Question

I have problem with dll file and have project which need this file System.Windows.Controls.dll for

listBox1.ItemsSource

error fix , and a

Answer 1

Here are the steps:

1. Right click on References in the Solutions Explorer (Solutions explorer is on the right of your IDE)
2. Select Add Reference
3. In the window that opens, Select Assemblies > Framework
4. Check the PresentationFramework component box and click ok