WPF. Messagebox. How to change the style of the dialog box?

No MessageBox - system, it does not stylize.

Use samopisny MessageBox , the benefit there is not much to write.

Here is an example:

XAML:

 <Window x:Class="Test.MessageBox" 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:Test" mc:Ignorable="d" Title="Message Box" Height="200" Width="300"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="*"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <TextBlock Name="MessageContainer" TextWrapping="WrapWithOverflow" Margin="10"/> <StackPanel Name="ButtonContainer" Grid.Row="1" Orientation="Horizontal" HorizontalAlignment="Right" Margin="10"> <StackPanel.Resources> <Style TargetType="Button"> <Setter Property="MinHeight" Value="25"/> <Setter Property="MinWidth" Value="75"/> <Setter Property="Margin" Value="10,0,0,0"/> </Style> </StackPanel.Resources> </StackPanel> </Grid> </Window> 

Code-behind:

 public partial class MessageBox : Window { public MessageBox() { InitializeComponent(); } void AddButtons(MessageBoxButton buttons) { switch (buttons) { case MessageBoxButton.OK: AddButton("OK", MessageBoxResult.OK); break; case MessageBoxButton.OKCancel: AddButton("OK", MessageBoxResult.OK); AddButton("Cancel", MessageBoxResult.Cancel, isCancel: true); break; case MessageBoxButton.YesNo: AddButton("Yes", MessageBoxResult.Yes); AddButton("No", MessageBoxResult.No); break; case MessageBoxButton.YesNoCancel: AddButton("Yes", MessageBoxResult.Yes); AddButton("No", MessageBoxResult.No); AddButton("Cancel", MessageBoxResult.Cancel, isCancel: true); break; default: throw new ArgumentException("Unknown button value", "buttons"); } } void AddButton(string text, MessageBoxResult result, bool isCancel = false) { var button = new Button() { Content = text, IsCancel = isCancel }; button.Click += (o, args) => { Result = result; DialogResult = true; }; ButtonContainer.Children.Add(button); } MessageBoxResult Result = MessageBoxResult.None; public static MessageBoxResult Show(string caption, string message, MessageBoxButton buttons) { var dialog = new MessageBox() { Title = caption }; dialog.MessageContainer.Text = message; dialog.AddButtons(buttons); dialog.ShowDialog(); return dialog.Result; } } 

As a result, you get a normal window, and you can stylize it as you like.

You will have to solve the problems with localization, with resizing the window (it is not necessary to give the user the opportunity to maximize the window), etc.