asp.net core 9中，引入了HyBridCache，本質上他並不是全新的一種緩存，而以與原來的緩存復合使用。
<ProjectSdk="Microsoft.NET.Sdk.Web"><PropertyGroup><TargetFramework>net9.0</TargetFramework><Nullable>enable</Nullable><ImplicitUsings>enable</ImplicitUsings></PropertyGroup><ItemGroup><PackageReferenceInclude="Microsoft.Extensions.Caching.StackExchangeRedis"Version="9.0.0-preview.4.24267.6" /></ItemGroup></Project>
下面的例子，time0是記憶體緩存，time1是基於Redis分布式緩存，time3是混合式緩存。
如果說time0，time1是自己當家做主的話，那麽tim2就要基於Memory或Distributed緩存了。預設狀況下，builder.Services.AddHybridCache是基於記憶體緩存的，如果想基於別的分布式緩存，只需要添加對應的Service就可以了。
using Microsoft.Extensions.Caching.Distributed;using Microsoft.Extensions.Caching.Hybrid;using Microsoft.Extensions.Caching.Memory;var builder = WebApplication.CreateBuilder(args);builder.Services.AddMemoryCache();builder.Services.AddStackExchangeRedisCache(opt =>{ opt.ConfigurationOptions = new StackExchange.Redis.ConfigurationOptions { EndPoints = { "localhost:6379" }, AbortOnConnectFail = false };});builder.Services.AddHybridCache();var app = builder.Build();app.MapGet("/time0", async (IMemoryCache cache) =>{returnawait cache.GetOrCreateAsync("time0", async _ => await Task.FromResult(DateTime.Now));});app.MapGet("/time1", async (IDistributedCache cache) =>{var time = await cache.GetStringAsync("time1");if (string.IsNullOrWhiteSpace(time)) { time = DateTime.Now.ToString();await cache.SetStringAsync("time1", time); }return time;});app.MapGet("/time2", async (HybridCache cache) =>{returnawait cache.GetOrCreateAsync("time2", async _ => await Task.FromResult(DateTime.Now));});app.Run();
如上程式碼，如果添加了記憶體，和一種分布式，那麽混合緩存用的是誰呢？請自行試驗，可以把結果同步到本篇文章的評論裏。：）
