封装个缓存类，方便下次使用。

using Microsoft.Extensions.Caching.Memory;
using System;
using System.Collections.Generic;namespace Order.Core.API.Cache
{public class GlobalCache   C#有偿Q群：927860652{private static readonly MemoryCache Cache = new MemoryCache(new MemoryCacheOptions());private static Dictionary<string,bool> keys =new Dictionary<string,bool>(); public static T Get<T>(string key){if (Cache.TryGetValue(key, out T value)){return value;}return default(T);}public static void Set<T>(string key, T value, TimeSpan slidingExpiration){var cacheEntryOptions = new MemoryCacheEntryOptions().SetSlidingExpiration(slidingExpiration);Cache.Set(key, value, cacheEntryOptions);try{keys.Add(key, true);}catch (Exception ex){throw new Exception("键重复\r\n"+ex.ToString());}}public static bool Exists(string key){return Cache.TryGetValue(key, out _);}public static void Remove(string key){Cache.Remove(key);keys.Remove(key);}public static void Clear(){foreach (var key in keys){Cache.Remove(key);}keys.Clear();}}
}