Strongly-typed WeakReference

I was playing around with weak references recently and wanted to tidy up my code a little – there were casts everywhere – so I knocked up a derivation using generics. I'm sure someone somewhere already did this, but I thought I'd share it anyway, so here it is.

/// <summary>
/// Strongly-typed weak reference.
/// </summary>
/// <typeparam name="T">The type of object being referenced.</typeparam>
public class WeakReference<T> : WeakReference, ISerializable where T : class
{
    /// <summary>
    /// Initializes a new instance of the  <see cref="WeakReference<T>"/> class, referencing
    /// the specified object.
    /// </summary>
    /// <param name="target">An object to track.</param>
    public WeakReference(T target)
        : base(target)
    {

    }

    /// <summary>
    /// Initializes a new instance of the  <see cref="WeakReference<T>"/> class, referencing
    /// the specified object and using the specified resurrection tracking.
    /// </summary>
    /// <param name="target">An object to track.</param>
    /// <param name="trackResurrection">Indicates when to stop tracking the object. If <c>true</c>, the object is tracked
    /// after finalization; if <c>false</c>, the object is only tracked until finalization..</param>
    public WeakReference(T target, bool trackResurrection)
        : base(target, trackResurrection)
    {
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="WeakReference<T>"/> class.
    /// </summary>
    /// <param name="info">An object that holds all the data needed to serialize or deserialize the current <see cref="T:System.WeakReference"/> object.</param>
    /// <param name="context">(Reserved) Describes the source and destination of the serialized stream specified by <paramref name="info"/>.</param>
    /// <exception cref="T:System.ArgumentNullException">
    /// 	<paramref name="info"/> is null. </exception>
    protected WeakReference(SerializationInfo info, StreamingContext context)
        : base(info, context)
    {
    }

    /// <summary>
    /// Gets or sets the object (the target) referenced by the current <see cref="T:System.WeakReference"/> object.
    /// </summary>
    /// <value></value>
    /// <returns>null if the object referenced by the current <see cref="T:System.WeakReference"/> object has been garbage collected; otherwise, a reference to the object referenced by the current <see cref="T:System.WeakReference"/> object.</returns>
    /// <exception cref="T:System.InvalidOperationException">The reference to the target object is invalid. This exception can be thrown while setting this property if the value is a null reference or if the object has been finalized during the set operation.</exception>
    public new T Target
    {
        get
        {
            return (T)base.Target;
        }

        set
        {
            base.Target = value;
        }
    }
}

There's not much to say about this class. I've replaced the Target property of the original WeakReference class with a strongly-typed one based on the type parameter, T. The other bits are just constructors to mirror those in the base class and it's job done.