Microsoft.JScript.Typeof.Evaluate C# (CSharp) Method

      internal override Object Evaluate(){
        try{
          return JScriptTypeof(this.operand.Evaluate(), VsaEngine.executeForJSEE);
        }catch(JScriptException e){
          if ((e.Number & 0xFFFF) == (int)JSError.UndefinedIdentifier)
            return "undefined";
          throw e;
        }
      }