EnumTemplateSelector.cs

using System.Windows;
using System.Windows.Controls;
 
namespace Vereinsmeisterschaften.TemplateSelectors
{
    public class EnumTemplateSelector : DataTemplateSelector
    {
        public Dictionary<Enum, DataTemplate> Templates { get; } = new();

        public override DataTemplate SelectTemplate(object item, DependencyObject container)
        {
            if (item is Enum filter && Templates.TryGetValue(filter, out var template))
                return template;
 
            // return empty DataTemplate, if item isn't found in Templates. Nothing is shown then (instead of the default .ToString()).
            return new DataTemplate();
        }
    }
}