App.xaml

<Application x:Class="Majestic_Family_Tool.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:Majestic_Family_Tool"
             xmlns:viewModel="clr-namespace:Majestic_Family_Tool.MVVM.ViewModel"
             xmlns:view="clr-namespace:Majestic_Family_Tool.Panels"
             StartupUri="MainWindow.xaml">
    
    <Application.Resources>
        <ResourceDictionary>
            <DataTemplate DataType="{x:Type viewModel:AddPayViewModel}">
                <view:PaymentPanel/>
            </DataTemplate>

            <DataTemplate DataType="{x:Type viewModel:TableViewModel}">
                <view:TablePanel/>
            </DataTemplate>

            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/Styles/ButtonStyles.xaml"/>
                <ResourceDictionary Source="/Styles/DGStyles.xaml"/>
                <ResourceDictionary Source="/Styles/ScrollBars.xaml"/>
                <ResourceDictionary Source="/Styles/ContextMenus.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>