In this step, you'll create a UWP application in Visual Studio using DropDown for UWP.

1. In Visual Studio 2013 Select File | New | Project.
2. In the New Project dialog box, select Templates | Visual C# | Windows | Universal. From the templates list, select Blank App (Universal Windows). Enter a Name and click OK to create your project.
3. Open MainPage.xaml if it isn't already open. 
4. Edit your opening <Page> tag to add the following namespace:

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xmlns:Xaml="using:C1.Xaml"

5. Locate the <Grid> </Grid> tags on your page and insert the following to define your Grid rows:

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<Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition/> </Grid.RowDefinitions>

6. Directly below the row definitions, add a CheckBox using the following markup:

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<CheckBox Content="AutoClose - determines if C1DropDown will automatically close when focus is lost." IsChecked="{Binding ElementName=c1DropDown1, Path=AutoClose, Mode=TwoWay}" Margin="10"/>

7. Use the following markup to add a C1DropDownButton control:

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<Xaml:C1DropDownButton Grid.Row="1" Background="White" x:Name="c1DropDown1" Padding="2" Width="150" HorizontalAlignment="Center" VerticalAlignment="Center" > </Xaml:C1DropDownButton>

8.  Next, we'll add some Header content to customize the C1DropDownButton.Header:

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<Xaml:C1DropDownButton.Header> <Border x:Name="dropDownBorder" Background="White" /> </Xaml:C1DropDownButton.Header>

What You've Accomplished

In this step, you created a new Visual Studio Universal Windows application, added a CheckBox control, and added and began customizing a C1DropDown control.