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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Tango.BL
{
    /// <summary>
    /// Represents an observable modified event arguments.
    /// </summary>
    /// <seealso cref="System.EventArgs" />
    public class ObservableModifiedEventArgs : EventArgs
    {
        /// <summary>
        /// Gets or sets the modified entity context.
        /// </summary>
        public ObservablesContext Context { get; set; }

        /// <summary>
        /// Gets or sets the modified entity.
        /// </summary>
        public IObservableEntity ModifiedEntity { get; set; }

        /// <summary>
        /// Gets or sets the notified entity.
        /// </summary>
        public IObservableEntity NotifiedEntity { get; set; }

        /// <summary>
        /// Gets a value indicating whether the modified entity is not the notified entity.
        /// </summary>
        public bool IsOtherContext
        {
            get { return ModifiedEntity != NotifiedEntity; }
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ObservableModifiedEventArgs"/> class.
        /// </summary>
        /// <param name="context">The context.</param>
        /// <param name="source">The source.</param>
        /// <param name="target">The target.</param>
        public ObservableModifiedEventArgs(ObservablesContext context, IObservableEntity source, IObservableEntity target)
        {
            Context = context;
            ModifiedEntity = source;
            NotifiedEntity = target;
        }
    }
}