Cache read and write the code

public class DoCatch
    {
        /// <summary>
        // Get the current value of the specified CacheKey Cache object applications
        /// </summary>
        /// <param name = "CacheKey"> index key </ param>
        /// <returns> buffer object returns </ returns>
        public static object GetCache(string CacheKey)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            return objCache[CacheKey];
        }

        /// <summary>
        // set the current value of the specified CacheKey Cache object applications
        /// </summary>
        /// <param name = "CacheKey"> index key </ param>
        /// <param name = "objObject"> Cache Object </ param>
        public static void SetCache(string CacheKey, object objObject)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Insert(CacheKey, objObject);
        }

        /// <summary>
        // set the current value of the specified CacheKey Cache object applications
        /// </summary>
        /// <param name = "CacheKey"> index key </ param>
        /// <param name = "objObject"> Cache Object </ param>
        /// <param name = "absoluteExpiration"> absolute expiration time </ param>
        /// <param name = "slidingExpiration"> time expires between the target interval inserted object was last accessed </ param>
        public static void SetCache(string CacheKey, object objObject, DateTime absoluteExpiration, TimeSpan slidingExpiration)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            if (objObject != null)
                objCache.Insert(CacheKey, objObject, null, absoluteExpiration, slidingExpiration);
        }

        public static void ClearCache(string key)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Remove(key);
        }
    }