MainView.xaml
<Controls:MetroWindow
x:Class="WpfApp12.View.MainView"
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:WpfApp12.View"
mc:Ignorable="d"
xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
xmlns:ei="http://schemas.microsoft.com/xaml/behaviors"
xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
xmlns:l="http://schemas.livet-mvvm.net/2011/wpf"
xmlns:vm="clr-namespace:WpfApp12.ViewModel"
xmlns:Dialog="clr-namespace:MahApps.Metro.Controls.Dialogs;assembly=MahApps.Metro"
Dialog:DialogParticipation.Register="{Binding}"
TextElement.Foreground="{DynamicResource MaterialDesignBody}"
TextElement.FontWeight="Regular"
TextElement.FontSize="13"
TextOptions.TextFormattingMode="Ideal"
TextOptions.TextRenderingMode="Auto"
Background="{DynamicResource MaterialDesignPaper}"
FontFamily="{DynamicResource MaterialDesignFont}"
ResizeMode="CanResizeWithGrip"
WindowStartupLocation="CenterScreen"
GlowBrush="{DynamicResource AccentColorBrush}"
WindowTransitionsEnabled="False"
TitleCharacterCasing="Normal"
ShowIconOnTitleBar="True"
Title="MainView" Height="450" Width="800">
<Window.DataContext>
<vm:MainViewModel>
<vm:MainViewModel.MahAppsDialogCoordinator>
<Dialog:DialogCoordinator/>
</vm:MainViewModel.MahAppsDialogCoordinator>
</vm:MainViewModel>
</Window.DataContext>
<Grid>
<Button Content="MessageBox" Margin="10,10,657,359" Height="Auto">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Click">
<l:LivetCallMethodAction MethodTarget="{Binding}" MethodName="ShowMessageBox" />
</i:EventTrigger>
</i:Interaction.Triggers>
</Button>
<Button Content="Progress" Margin="155,10,512,359" Height="Auto">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Click">
<l:LivetCallMethodAction MethodTarget="{Binding}" MethodName="ShowProgress" />
</i:EventTrigger>
</i:Interaction.Triggers>
</Button>
</Grid>
</Controls:MetroWindow>