Cache缓存帮助类

public class Cache
	{
		private static Cache _cache = HttpRuntime.Cache;
		/// <summary>
		/// 本地缓存获取
		/// </summary>
		/// <param name="name">key</param>
		/// <returns></returns>
		public static object GetCache(string name)
		{
			return Cache._cache.Get(name);
		}
		/// <summary>
		/// 本地缓存写入（默认缓存20min）
		/// </summary>
		/// <param name="name">key</param>
		/// <param name="value">value</param>
		public static void SetCache(string name, object value)
		{
			Cache._cache.Insert(name, value, null, Cache.NoAbsoluteExpiration, TimeSpan.FromMinutes(20.0));
		}
		/// <summary>
		/// 本地缓存写入
		/// </summary>
		/// <param name="name">key</param>
		/// <param name="value">value</param>
		/// <param name="minutes">缓存分钟</param>
		public static void SetCache(string name, object value, int minutes)
		{
			Cache._cache.Insert(name, value, null, Cache.NoAbsoluteExpiration, TimeSpan.FromMinutes((double)minutes));
		}
		/// <summary>
		/// 读取缓存
		/// </summary>
		/// <param name="cacheKey">键</param>
		/// <returns></returns>
		public static T GetCache<T>(string cacheKey) where T : class
		{
			bool flag = Cache._cache[cacheKey] != null;
			T result;
			if (flag)
			{
				result = (T)Cache._cache[cacheKey];
			}
			else
			{
				result = default(T);
			}
			return result;
		}
		/// <summary>
		/// 写入缓存
		/// </summary>
		/// <param name="value">对象数据</param>
		/// <param name="cacheKey">键</param>
		public static void SetCache<T>(T value, string cacheKey) where T : class
		{
			Cache._cache.Insert(cacheKey, value, null, DateTime.Now.AddMinutes(20.0), Cache.NoSlidingExpiration);
		}
		/// <summary>
		/// 写入缓存
		/// </summary>
		/// <param name="value">对象数据</param>
		/// <param name="cacheKey">键</param>
		/// <param name="expireTime">到期时间</param>
		public static void SetCache<T>(T value, string cacheKey, DateTime expireTime) where T : class
		{
			Cache._cache.Insert(cacheKey, value, null, expireTime, Cache.NoSlidingExpiration);
		}
		/// <summary>
		/// 移除指定数据缓存
		/// </summary>
		/// <param name="cacheKey">键</param>
		public static void RemoveCache(string cacheKey)
		{
			Cache._cache.Remove(cacheKey);
		}
		/// <summary>
		/// 移除全部缓存
		/// </summary>
		public static void RemoveCache()
		{
			IDictionaryEnumerator enumerator = Cache._cache.GetEnumerator();
			while (enumerator.MoveNext())
			{
				Cache._cache.Remove(enumerator.Key.ToString());
			}
		}
	}