Uppercase key value returned as lowercase in HTTP response

Question

In the backend (.net core) I'm making dictionary:

key can be 'TEST', testAAAA', 'test', 'TEst' all possible variations.

However this specific result is returned as (image is from postman):

as you see key here is 'mo' instead of 'MO' . Is it possible to make it case sensitive? so that it wouldn't be made lowercase?

in my startup.cs class I have:

                opt =>
                {
                    opt.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
                    opt.SerializerSettings.Converters.Add(new StringEnumConverter { CamelCaseText = true });
                  //  opt.SerializerSettings.Converters.Add(new UnixDateTimeConverter());
                    opt.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
                    opt.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
                });

Answer 1

opt.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
opt.SerializerSettings.Converters.Add(new StringEnumConverter { CamelCaseText = true });

You're specifically feeding in a resolver and a converter that is telling it to update the casing to camelCase - both incoming and outgoing.

You'll need to change your settings to have it not do that, or you'll need to implement a custom resolver that does different things depending on the class.

You can see some examples of custom resolvers here in the newtonsoft documentation.