I am opening a shapefile that was exported from another commercial software package and the spatial reference has a Wkid of 0. It looks like the spatial reference wasn't identified by the SDK even though I can see in the .PRJ file that it is a publicly defined projection system. The spatial reference appears to work except that shapefile tables can't be reprojected and I need it to be visible when I am showing other data in the publicly defined projection system. I am using ArcGIS Runtime SDK for .NET 10.2.7. Any help with this would be appreciated.