WPF static binding does not work in list view

I am currently attaching a list to a list of objects, and each of them works.

I can snap to my code behind xaml while I put in my Window element DataContext="{Binding RelativeSource={RelativeSource Self}}"

My ListView looks like this, and bindings work correctly for my bound columns on the properties of MyCollection elements.

<ListView ItemsSource="{Binding MyCollection}">

For one of the columns, although I always want him to say the same thing. For example, this column will always contain "Hello World"

The following code gives me an error for binding:

<GridViewColumn Header="I want all fields to be Hello World" DisplayMemberBinding="{Binding Source={x:Static Member=MyNamespace.MyStaticClass},Path=MyStaticStringField}" />

I get an error message:

error MC3050: Cannot find type "MyNamespace". Note that type names are case sensitive.

MyNamespace is the same namespace as the window itself, and MyStaticClass is public

If I try instead:

<GridViewColumn Header="I want all fields to be Hello World" DisplayMemberBinding="{Binding Source={x:Static Member=MyStaticClass},Path=MyStaticStringField}" />

I get an error message:

MC3029: MyStaticClass , .

, , :

<GridViewColumn Header="This works" DisplayMemberBinding="{Binding Source={x:Static Member=SystemFonts.IconFontFamily}, Path=Source}" />

, :

namespace MyNamespace
{
    public static class MyStaticClass
    {
        public static string MyStaticStringField{ get; set; }

    }
}