Closed Unassigned: GDALImage read [25520]

Hi,
I want to load a tiff image. i use this code for load it

using DotSpatial.Data;
using DotSpatial.Data.Rasters.GdalExtension;
GdalImage img = new GdalImage(@"Data\map0-Georef.tif");


But an error returned that showed below

Anyone can help me??
thanks
Comments: Not an issue