using System;
using System.Runtime.InteropServices;
 
namespace System.Windows.Threading
{
    /// <summary>
    ///     An enunmeration describing the priorities at which
    ///     operations can be invoked via the Dispatcher.
    /// </summary>
    ///
    public enum DispatcherPriority
    {
        /// <summary>
        ///     This is an invalid priority.
        /// </summary>
        Invalid = -1,
 
        /// <summary>
        ///     Operations at this priority are not processed.
        /// </summary>
        Inactive = 0,
 
        /// <summary>
        ///     Operations at this priority are processed when the system
        ///     is idle.
        /// </summary>
        SystemIdle,
 
        /// <summary>
        ///     Operations at this priority are processed when the application
        ///     is idle.
        /// </summary>
        ApplicationIdle,
 
        /// <summary>
        ///     Operations at this priority are processed when the context
        ///     is idle.
        /// </summary>
        ContextIdle,
 
        /// <summary>
        ///     Operations at this priority are processed after all other
        ///     non-idle operations are done.
        /// </summary>
        Background,
 
        /// <summary>
        ///     Operations at this priority are processed at the same
        ///     priority as input.
        /// </summary>
        Input,
 
        /// <summary>
        ///     Operations at this priority are processed when layout and render is
        ///     done but just before items at input priority are serviced. Specifically
        ///     this is used while firing the Loaded event
        /// </summary>
        Loaded,
 
        /// <summary>
        ///     Operations at this priority are processed at the same
        ///     priority as rendering.
        /// </summary>
        Render,
 
        /// <summary>
        ///     Operations at this priority are processed at the same
        ///     priority as data binding.
        /// </summary>
        DataBind,
 
        /// <summary>
        ///     Operations at this priority are processed at normal priority.
        /// </summary>
        Normal,
 
        /// <summary>
        ///     Operations at this priority are processed before other
        ///     asynchronous operations.
        /// </summary>
        Send
    }
}