Add how to bind enum article (#1056)

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* Update how-to-bind-to-an-enumeration.md

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Co-authored-by: Tom Dykstra <[email protected]>

Co-authored-by: Tom Dykstra <[email protected]>

dotnet-desktop-guide/net/wpf/data/how-to-bind-to-an-enumeration.md

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+---
+title: How to bind to an enumeration
+description: Learn how to use data binding to bind an enumeration to a collection object in XAML and in code for Windows Presentation Foundation.
+author: adegeo
+ms.author: adegeo
+ms.date: 04/30/2021
+dev_langs:
+  - "csharp"
+  - "vb"
+helpviewer_keywords: 
+  - "binding data [WPF], enumeration"
+  - "data binding [WPF], enumeration"
+  - "enumeration [WPF]"
+---
+
+# How to bind to an enumeration (WPF .NET)
+
+This example shows how to bind to an enumeration. Unfortunately there isn't a direct way to use an enumeration as a data binding source. However, the <xref:System.Enum.GetValues(System.Type)?displayProperty=nameWithType> method returns a collection of values. These values can be wrapped in an <xref:System.Windows.Data.ObjectDataProvider> and used as a data source.
+
+The <xref:System.Windows.Data.ObjectDataProvider> type provides a convenient way to create an object in XAML and use it as a data source.
+
+[!INCLUDE [desktop guide under construction](../../includes/desktop-guide-preview-note.md)]
+
+## Reference the enumeration
+
+Use the <xref:System.Windows.Data.ObjectDataProvider> type to wrap an array of enumeration values provided by the enumeration type itself.
+
+01. Create a new `ObjectDataProvider` as a XAML resource, either in your application XAML or the XAML of the object you're working with. This example uses a window and creates the `ObjectDataProvider` with a resource key of `EnumDataSource`.
+
+    :::code language="xaml" source="./snippets/how-to-bind-to-an-enumeration/csharp/BindEnum.xaml" id="Resources":::
+
+    In this example, the `ObjectDataProvider` uses three properties to retrieve the enumeration:
+
+    | Property           | Description                                                                                                                                                            |
+    |--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+    | `ObjectType`       | The type of object to be returned by the data provider. In this example, <xref:System.Enum?displayProperty=fullName>. The `sys:` XAML namespace is mapped to `System`. |
+    | `MethodName`       | The name of the method to run on the `System.Enum` type. In this example, <xref:System.Enum.GetValues%2A?displayProperty=nameWithType>.                                |
+    | `MethodParameters` | A collection of values to provide to the `MethodName` method. In this example, the method takes the `System.Type` of the enumeration.                                  |
+
+    Effectively, the XAML is breaking down a method call, method name, parameters, and the return type. The `ObjectDataProvider` configured in the previous example is the equivalent of the following code:
+
+    :::code language="csharp" source="./snippets/how-to-bind-to-an-enumeration/csharp/BindEnum.xaml.cs" id="EnumGetValues":::
+    :::code language="vb" source="./snippets/how-to-bind-to-an-enumeration/vb/BindEnum.xaml.vb" id="EnumGetValues":::
+
+02. Reference the `ObjectDataProvider` resource. The following XAML lists the enumeration values in a <xref:System.Windows.Controls.ListBox> control:
+
+    :::code language="xaml" source="./snippets/how-to-bind-to-an-enumeration/csharp/BindEnum.xaml" id="ListBox":::
+
+## Full XAML
+
+The following XAML code represents a simple window that does the following:
+
+01. Wraps the <xref:System.Windows.HorizontalAlignment> enumeration in a <xref:System.Windows.Data.ObjectDataProvider> data source as a resource.
+01. Provides a <xref:System.Windows.Controls.ListBox> control to list all enumeration values.
+01. Binds a <xref:System.Windows.Controls.Button> control's <xref:System.Windows.FrameworkElement.HorizontalAlignment> property to the selected item in the `ListBox`.
+
+:::code language="xaml" source="./snippets/how-to-bind-to-an-enumeration/csharp/BindEnumFull.xaml":::
+
+## See also
+
+- [Data binding overview](index.md)
+- [Binding sources overview](binding-sources-overview.md)
+- [StaticResource Markup Extension](../../../framework/wpf/advanced/staticresource-markup-extension.md)
+- [An alternative way to bind to an enumeration](https://brianlagunas.com/a-better-way-to-data-bind-enums-in-wpf/)