做了一个时间优化的项目，目的就是缩短程序过程中的时间花费，最后发现了asp.net和asp.net core 中都有缓存工具来进行缓存，以加快访问速度。
找了官方demo来进行分析:
?????ObjectCache cache = MemoryCache.Default; ???????????string fileContents = cache["filecontents"] as string; //获取缓存值 ???????????if (fileContents == null) ???????????{ ???????????????CacheItemPolicy policy = new CacheItemPolicy(); ???????????????policy.AbsoluteExpiration = DateTimeOffset.Now.AddSeconds(10.0);//设置缓存失效时间 ???????????????List<string> filePaths = new List<string>(); ???????????????string cachedFilePath = Server.MapPath("~") + "\\cacheText.txt"; ???????????????filePaths.Add(cachedFilePath); ???????????????policy.ChangeMonitors.Add(new HostFileChangeMonitor(filePaths)); ???????????????fileContents = System.IO.File.ReadAllText(cachedFilePath, Encoding.Default); ???????????????cache.Set("filecontents", fileContents, policy);//设置缓存中 ???????????} ???????????return fileContents;官方参考路径:https://docs.microsoft.com/en-us/dotnet/framework/performance/caching-in-net-framework-applications
Asp.net中使用缓存(cache)
原文地址：https://www.cnblogs.com/fishyues/p/10278545.html