System.Text.RegularExpressions.RegexCharClass.RangeCount C# (CSharp) Method

        private int RangeCount() {
            return _rangelist.Count;
        }

 internal void AddCharClass(RegexCharClass cc)
 {
     if ((this._canonical && (this.RangeCount() > 0)) && ((cc.RangeCount() > 0) && (cc.Range(cc.RangeCount() - 1)._last <= this.Range(this.RangeCount() - 1)._last)))
     {
         this._canonical = false;
     }
     for (int i = 0; i < cc.RangeCount(); i++)
     {
         this._rangelist.Add(cc.Range(i));
     }
     this._categories.Append(cc._categories.ToString());
 }