Cache data in a .NET application with MemoryCache

Register the dependency in Main:

builder.Services.AddMemoryCache();

Inject the service into your class constructor:

public class MyClass(IMemoryCache memoryCache) { ... }

Set a cache value:

memoryCache.Set("cacheKeyName", myType, new MemoryCacheEntryOptions
{
    SlidingExpiration = TimeSpan.FromMinutes(5), // Expire if the cache item has been inactive for 5 minutes
});

Retrieve a cached value:

var cached = memoryCache.TryGetValue<MyType>("cacheKeyName", out var myType);