Simple Generic EventArgs<T> implementation,

EventArgs.cs

using System;
using System.Security.Permissions;
using System.Runtime.Serialization;

/// <summary>
/// Generic implementation of the <c>System.EventArgs</c> the base class for 
/// classes containing event data.
/// </summary>
[Serializable]
public class EventArgs<TData> : EventArgs, ISerializable
{
    #region Constructor Members

    /// <summary>
    /// Initialze a new instance of the <c>EventArgs</c> class.
    /// </summary>
    public EventArgs(TData eventData)
    {
        Data = eventData;
    }
    /// <summary>
    /// Initialze a new instance of the <c>EventArgs</c> class.
    /// </summary>
    /// <param name="info"></param>
    /// <param name="context"></param>
    private EventArgs(SerializationInfo info, StreamingContext context)
    {
        Data = (TData)info.GetValue("Data", typeof(TData));
    }

    #endregion

    #region Property Members

    /// <summary>
    /// Gets the event data.
    /// </summary>
    public TData Data
    {
        get;
        private set;
    }

    #endregion

    #region ISerializable Members

    [SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.SerializationFormatter)]
    public virtual void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.AddValue("Data", Data, typeof(TData));
    }

    #endregion
}