privatevoid _twain32_XferDone(object sender,Twain32.XferDoneEventArgs e) {
    try {
        #region Image info

        this.textBox1.AppendText(string.Format("Image Info:{0}",Environment.NewLine));
        var _imageInfo=e.GetImageInfo();
        this.textBox1.AppendText(string.Format("YResolution={0}; XResolution={1}; PixelType={2}; SamplesPerPixel={3}; ImageWidth={4}; ImageLength={5};{6}",_imageInfo.YResolution,_imageInfo.XResolution,_imageInfo.PixelType,_imageInfo.SamplesPerPixel,_imageInfo.ImageWidth,_imageInfo.ImageLength,Environment.NewLine));

        #endregion#region Extended Image Info

        if((this._twain32.IsCapSupported(TwCap.ExtImageInfo)&TwQC.Get)!=0) { // if extended image info supportthis.textBox1.AppendText("Extended Image Info:");
            var _extImageInfo=e.GetExtImageInfo(new TwEI[] { TwEI.BarCodeCount,TwEI.BarCodeType,TwEI.BarCodeTextLength,TwEI.Camera,TwEI.Frame,TwEI.PixelFlavor,TwEI.DocumentNumber });

            #region Show info

            foreach(var _item in _extImageInfo) {
                this.textBox1.AppendText(string.Format("{0}{1} = ",Environment.NewLine,_item.InfoId));
                if(_item.IsSuccess) {
                    if(_item.Value isobject[]) {
                        foreach(var _value in _item.Value asobject[]) {
                            this.textBox1.AppendText(string.Format("{0}; ",_value));
                        }
                    } else {
                        this.textBox1.AppendText(string.Format("{0}; ",_item.Value));
                    }
                }
                if(_item.IsNotAvailable) {
                    this.textBox1.AppendText("NotAvailable");
                }
                if(_item.IsNotSupported) {
                    this.textBox1.AppendText("NotSupported");
                }
            }

        }

        #endregion#endregion
    } catch(Exception ex) {
        this.textBox1.AppendText(string.Format("{0}: {1}",ex.GetType().Name,ex.Message));
    }
}