Binding to a property of a static class is quite straight forward.

The binding string looks like this:

{x:Static s:MyStaticClass.StaticValue2}

For an example do this:

1. Create a new folder in your project called Statics.
2. Add the following class to the Statics folder.

   using System;
   
   namespace BindingToStaticClassExample.Statics
   {
       public static class MyStaticClass
       {
           static MyStaticClass()
           {
               Title = "Binding to properties of Static Classes";
               StaticValue1 = "Test 1";
               StaticValue2 = "Test 2";
               StaticValue3 = "Test 3";
           }
   
           public static String Title { get; set; }
           public static String StaticValue1 { get; set; }
           public static String StaticValue2 { get; set; }
           public static String StaticValue3 { get; set; }
       }
   }
   

3. Add a reference to the BindingToStaticClassExample.Statics namespace. (See line 4.)
4. Bind the title to the Title string value of MyStaticClass.
5. Change the <Grid> to a <StackPanel> (not required just for ease of this example).
6. Add TextBox elements and bind them to the two string values in MyStaticClass object.

   <Window x:Class="BindingToStaticClassExample.MainWindow"
           xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
           xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
           xmlns:s="clr-namespace:BindingToStaticClassExample.Statics"
           Title="{x:Static s:MyStaticClass.Title}" Height="350" Width="525">
       <StackPanel>
           <TextBox Text="{x:Static s:MyStaticClass.StaticValue1}" />
           <TextBox Text="{x:Static s:MyStaticClass.StaticValue2}" />
           <!-- Not supported and won't work
           <TextBox>
               <TextBox.Text>
                   <Binding Source="{x:Static s:MyStaticClass.StaticValue3}" />
               </TextBox.Text>
           </TextBox>
           -->
       </StackPanel>
   </Window>
   

You now know how to bind to properties of a static class.