public void TestMyExtension()
{
var cache = new Microsoft.Extensions.Caching.Memory.MemoryCache(new MemoryCacheOptions());
cache.MySet("user", new User {
Name = "Foo"
});
var f = cache.MyGet <User>("user");
Assert.Equal("Foo", f.Name);
f.Name = "Bar";
var b = cache.MyGet <User>("user");
Assert.Equal("Foo", b.Name);
}