[JsonProperty("flv-270p")]
        public string flv270p { get; set; }

public string flv270-p { get; set; }

identifier:
    available-identifier
    @   identifier-or-keyword
available-identifier:
    An identifier-or-keyword that is not a keyword
identifier-or-keyword:
    identifier-start-character   identifier-part-charactersopt
identifier-start-character:
    letter-character
    _ (the underscore character U+005F)
identifier-part-characters:
    identifier-part-character
    identifier-part-characters   identifier-part-character
identifier-part-character:
    letter-character
    decimal-digit-character
    connecting-character
    combining-character
    formatting-character
letter-character:
    A Unicode character of classes Lu, Ll, Lt, Lm, Lo, or Nl
    A unicode-escape-sequence representing a character of classes Lu, Ll, Lt, Lm, Lo, or Nl
combining-character:
    A Unicode character of classes Mn or Mc
    A unicode-escape-sequence representing a character of classes Mn or Mc
decimal-digit-character:
    A Unicode character of the class Nd
    A unicode-escape-sequence representing a character of the class Nd
connecting-character:
    A Unicode character of the class Pc
    A unicode-escape-sequence representing a character of the class Pc
formatting-character:
    A Unicode character of the class Cf
    A unicode-escape-sequence representing a character of the class Cf

int x-y = 3;
int x = 10;
int y = 2;
int z = x-y; //3 or 8? Impossible to tell if the first line were allowed.

var jsonstring = ApiRequest.DoRequest(ApiRequest.GetBaseUriFor(typeof(SMS), "/sms/json"), new Dictionary<string, string>()
        {
            {"from", request.from},
            {"to", request.to},
            {"text", request.text}
        });

        return JsonConvert.DeserializeObject<SMSResponse>(jsonstring);

var jsonstring = ApiRequest.DoRequest(ApiRequest.GetBaseUriFor(typeof(SMS), "/sms/json"), new Dictionary<string, string>()
        {
            {"from", request.from},
            {"to", request.to},
            {"text", request.text}
        }).Replace("-","_");

        return JsonConvert.DeserializeObject<SMSResponse>(jsonstring);