My first attempt with Int32.TryParse

jFirstInt32.TryParse

        private string _Angle;
        public string Angle {

            get {
                return this._Angle;
            }

            set {

                if (value != this._Angle) {
                    this._Angle = value;
                    NotifyPropertyChanged("Angle");
                    //}

                    // set intAngle an integer version of the sting Angle
                    int _intAngle;
                    bool isGood = Int32.TryParse(this._Angle, out _intAngle);
                    if (isGood) {
                        this.intAngle = _intAngle;
                        NotifyPropertyChanged("intAngle");
                    }
                    else { // I don't think I need the else although a range and an angle = a vector
                        // if either angle or range is a bad conversion the other should be discarded too.
                    }
                }
            }
        }

        public int intRange { get; set; }
        public int intAngle { get; set; }