App.xaml

<Application x:Class="PinTools.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:System="clr-namespace:System;assembly=mscorlib" 
             StartupUri="Views/MenuWindow.xaml">
    <Application.Resources>
        <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
        <DataGridLength x:Key="CheckColumnWidth">60</DataGridLength>
        <System:Double x:Key="ButtonWidth">100</System:Double>
        <Thickness x:Key="ButtonMargin">20,0,0,0</Thickness>
        <System:Double x:Key="NumberBoxWidth">120</System:Double>
    </Application.Resources>
</Application>