using System;

using System.Runtime.Caching;

public class Program

{

    public static void Main()

    {

            NFileCache target = new NFileCache();

            CacheItemPolicy policy = new CacheItemPolicy();

​

            // Add an item and have it expire 500 ms from now

            policy.SlidingExpiration = new TimeSpan(0, 0, 0, 0, 500);

            target.Set("test", "test", policy);

​

            // Sleep for 200

            Thread.Sleep(200);

​

            // Then try to access the item

            object result = target.Get("test");

            Assert.AreEqual("test", result);

​

            // Sleep for another 200

            Thread.Sleep(200);

​

            // Then try to access the item

            result = target.Get("test");

            Assert.AreEqual("test", result);

​

            // Then sleep for more than 500 ms. Should be gone

            Thread.Sleep(600);

            result = target.Get("test");

            Assert.IsNull(result);

        }

}