Create a new WPF project Install the Microsoft.Xaml.Behaviors.Wpf nuget package Download link: https://www.nuget.org/packages/Microsoft.Xaml.Behaviors.Wpf Copy the download link at the download page, open package manager console and enter the command: Create the Command and event handling code BaseViewModel.cs EventArgs.cs EventRaiser.cs RelayCommand.cs Create the combo box view and viewmodel SuggestionUserControl.cs Use the combo box user control in …

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