I am download https://github.com/ThinkGeo/ThinkGeoOfflineMapsViewerAndExtractor-ForWpf12 .
But the map is not displayed. Instead of card “INPUT string was not in a correct format”.
I created an empty project(.net core) and rewrote the code from the current project. But there was a new mistake “sqlite error 14 unable to open database file”
p.s. if I create net framework project mistake saved(Sql error 14).