Properly Implementing the Factory Pattern

IFactory.cs

using System;

/// <summary>
/// A generic factory pattern.
/// <para>The Factory pattern is a creational pattern, 
/// whose purpose is to define an interface for 
/// creating an object, but let subclasses decide 
/// which class to instantiate.</para>
/// </summary>
/// <typeparam name="T">The type created by the factory.</typeparam>
public interface IFactory<T> : IDisposable
    where T : IDisposable
{
    /// <summary>
    /// Create a new instance of the generic type.
    /// </summary>
    /// <returns>A new instance of the generic type.</returns>
    T CreateInstance();
}