<Window x:Class = "WPFComboBoxControl.MainWindow" xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x = "http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d = "http://schemas.microsoft.com/expression/blend/2008" xmlns:mc = "http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local = "clr-namespace:WPFComboBoxControl" mc:Ignorable = "d" Title = "MainWindow" Height = "350" Width = "604"> <Grid> <ComboBox x:Name = "comboBox" HorizontalAlignment = "Left" Margin = "80,53,0,0" VerticalAlignment = "Top" Width = "120" SelectionChanged = "Combo_SelectionChanged"> <ComboBoxItem Content = "Item #1" /> <ComboBoxItem Content = "Item #2" /> <ComboBoxItem Content = "Item #3" /> </ComboBox> <ComboBox x:Name = "comboBox1" HorizontalAlignment = "Left" Margin = "80,153,0,0" VerticalAlignment = "Top" Width = "120" IsEditable = "True" SelectionChanged = "Combo1_SelectionChanged"> <ComboBoxItem Content = "Item #1" /> <ComboBoxItem Content = "Item #2" /> <ComboBoxItem Content = "Item #3" /> </ComboBox> <TextBox x:Name = "textBox" HorizontalAlignment = "Left" Height = "23" Margin = "253,53,0,0" TextWrapping = "Wrap" VerticalAlignment = "Top" Width = "200" /> <TextBox x:Name = "textBox1" HorizontalAlignment = "Left" Height = "23" Margin = "253,152,0,0" TextWrapping = "Wrap" VerticalAlignment = "Top" Width = "200" /> </Grid> </Window>