TimeSpan cannot be used for caching.

[Nokecy]

   public class CacheItem
    {
        public TimeSpan TimeSpan { get; set;}
    }

  [Fact]
        public async Task Test_CacheAsync()
        {
            var cache = GetService<IDistributedCache<CacheItem, string>>();

            var cacheValue = new TimeSpan(10, 10, 10);
            
            await cache.SetAsync("abc", new CacheItem() { TimeSpan = cacheValue });

            var value = await cache.GetAsync("abc");

            value.TimeSpan.ShouldBe(cacheValue);
        }

Use memory cache
The test is Failed

[maliming]

hi

You can implement a converter, See: dotnet/runtime#29932 (comment) dotnet/runtime#54186

It will be available in net 6.

[Nokecy]

@maliming thx