var urls = new ExchangeUrls
            {
                Api =
                {
                    {"v2", "https://openapi.bitmart.com/v2/"},
                    {"public", "https://openapi.bitmart.com/v2/"},
                    {"private", "https://openapi.bitmart.com/v2/"}
                },
                Logo =
                    "https://user-images.githubusercontent.com/1294454/61835713-a2662f80-ae85-11e9-9d00-6442919701fd.jpg",
                Doc =
                {
                    "https://github.com/bitmartexchange/bitmart-official-api-docs",
                    "https://developer.bitmart.com/v2/en/"
                },
                Referral = "http://www.bitmart.com/?r=rQCFLh",
                Fees = {"https://www.bitmart.com/fee/en"},
                Www = "https://www.bitmart.com/"
            };

   at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean wrapExceptions, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& hasNoDefaultCtor)
   at System.RuntimeType.CreateInstanceDefaultCtorSlow(Boolean publicOnly, Boolean wrapExceptions, Boolean fillCache)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, Boolean wrapExceptions)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic, Boolean wrapExceptions)
   at System.Activator.CreateInstance(Type type)