Serialize json property names first letter lowercase solutions

// returns the interface automatically transferred lowercase, easily cause inconsistent end, not obtain the data transfer is switched to the hump (initials) as Code / Result

// configuration in ConfigureServices

services.AddMvc().AddJsonOptions(options => { options.SerializerSettings.ContractResolver = new DefaultContractResolver(); }).SetCompatibilityVersion(CompatibilityVersion.Version_2_2);