Display data in Blend for Visual Studio
You can view sample data in your designer as you customize the layout of your pages. You can generate sample data from scratch or by using an existing class. You can also connect to Live data that appears in your app when you run it.
Note
The Data panel in Blend is supported only for projects that target .NET Framework. It's not supported for UWP projects or projects that target .NET Core.
Generate sample data
To generate sample data, open a XAML document. In the Data panel, choose the Create sample data 
button, and then choose New Sample Data.
Define the structure of your data in the Data panel, and then bind it to UI elements on any page.
If you want your sample data to appear in your pages when you run the app, choose Data source options 
, and then choose Enable When Running Application.
Watch a short video: 
Create sample data from scratch.
Generate sample data from a class
If you've already created classes that describe the structure of your data, you can generate sample data from them.
To generate sample data from a class, open a XAML document, and then in the Data panel, click the Create sample data button, and then click Create Sample Data from Class.
Watch a short video: Mix up some data binding with Blend.