Unable to load ArcGIS.Desktop.xxxxx namespaces in v2.5

[SreenivasaRaoPigili]

Hi Team,

    We have developed a solution on v2.4 and which was working very good. I have updated to v2.5 and from then i am facing below errors.

When i checked in my installation directory(C:\Program Files\ArcGIS\Pro\bin)  - i am able to find these dlls (with 01/14/2020 date.)

Is there anything else - we have to do the configurations. Please help me.

FYI: Still same solution is working properly on ArcGIS Pro v2.4.

[KokiKUNIHARA]

Hello SreenivasaRao!

Have you done this yet? If you haven't, I think this is causing the trouble.

How To: Convert a version 2.0 to 2.4 ArcGIS Pro SDK add-in solution to Pro 2.5 and later versions 

[Wolf · Accepted solution]

ArcGIS Pro 2.5 requires the .Net Framework 4.8.  Once you change the target framework of your project to 4.8, the errors are resolved.  Details are documented here: https://github.com/esri/arcgis-pro-sdk#requirements