C# - Generische Event Args -> EventArgs<T>

using System;
using System.Diagnostics.Contracts;

namespace BE.Framework.Events
{
   /// <summary>
   /// Type Save Generic Eventargs
   /// </summary>
   /// <typeparam name="T">Type of the Argument Value</typeparam>
   /// <remarks>This generic inherited version of the default eventargs can be used to avoid many dummy eventarg classes. </remarks>
    public class EventArgs<T> : System.EventArgs
    {
        [ContractInvariantMethod]
        void ObjectInvariant()
        {
            Contract.Invariant(this.Value != null); 
        }

       private T m_Value;

       /// <summary>
       /// Gets or sets the value of the EventArgs.
       /// </summary>
       /// <value>The value.</value>
       public T Value
       { 
           get
           {
               return m_Value;
           }
           private set
           {
               
               m_Value = value;
           }
       }
        /// <summary>
        /// Initializes a new instance of the <see cref="GenericEventArgs&lt;T&gt;"/> class.
        /// </summary>
        public EventArgs()
            : base()
        {
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="GenericEventArgs&lt;T&gt;"/> class.
        /// </summary>
        public EventArgs(T value)
            : this()
        {
            Contract.Requires<ArgumentNullException>(value != null);
            Contract.Ensures(this.Value != null);
            this.Value = value;
        }
    }
}