We currently have projects with ArcGIS Runtime SDK WPF 10.2.5 in Visual Studio 2010 and 2012. We will start working with Visual Studio 2017 and it is not allowed to install ArcGIS Runtime SDK WPF 10.2.5. Is there any way to install it?
The solution to use ArcGIS Runtime SDK .Net 100.3.0 is not contemplated. Is it possible to run or is the ArcGIS Runtime SDK WPF 10.2.5 code compatible in ArcGIS Runtime SDK .Net 100.3.0?
Unfortunately Visual Studio 2017 is not supported by ArcGIS Runtime SDK for WPF and that's determined by the setup/installer.
Do you have VS2012 and VS2017 installed?
The setup lays down the API/SDK files on disk (e.g. C:\Program Files (x86)\ArcGIS SDKs) and creates a couple of registry keys (one for the location of the installation) and one for registering the API as a .NET Framework extension API so that VS finds the assembly reference. If you still have VS2012 installed, I would expect the registry keys to still be there.