MarkupExtension.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#nullable disable

using System.Runtime.CompilerServices;

namespace System.Windows.Markup
{
    /// <summary>
    /// Base class for all Xaml markup extensions. Only subclasses can
    /// be instantiated.
    /// </summary>
    [TypeForwardedFrom("WindowsBase, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35")]
    public abstract class MarkupExtension
    {
        /// <summary>
        /// Return an object that should be set on the targetObject's targetProperty
        /// for this markup extension.
        /// </summary>
        /// <param name="serviceProvider">Object that can provide services for the markup extension.</param>
        /// <returns>
        /// The object to set on this property.
        /// </returns>
        public abstract object ProvideValue(IServiceProvider serviceProvider);
    }
}