internal override bool TrySetPair(DxfCodePair pair)
        {
            switch (pair.Code)
            {
            case 70:
                this.IsDisplayFrameImage = BoolShort(pair.ShortValue);
                break;

            case 71:
                this.IsHighDisplayQuality = BoolShort(pair.ShortValue);
                break;

            case 72:
                this.ImageUnits = (DxfRasterImageUnits)(pair.ShortValue);
                break;

            case 90:
                this.ClassVersion = (pair.IntegerValue);
                break;

            default:
                return(base.TrySetPair(pair));
            }

            return(true);
        }
 protected override void Initialize()
 {
     base.Initialize();
     this.ClassVersion         = 0;
     this.IsDisplayFrameImage  = false;
     this.IsHighDisplayQuality = false;
     this.ImageUnits           = DxfRasterImageUnits.None;
 }