https://community.esri.com/t5/arcgis-pro-sdk-ideas/implement-assemblyloadcontext-for-add-in-isolation/idi-p/1589344 <P><SPAN>We would like to request the implementation of </SPAN><SPAN>AssemblyLoadContext</SPAN><SPAN> in ArcGIS Pro to improve add-in isolation and prevent assembly version conflicts.</SPAN></P><P><SPAN>Currently, ArcGIS Pro loads all add-ins into the same AppDomain, which means that when different add-ins depend on different versions of the same third-party library (like Log4Net or Gdal), only the highest version is loaded and used globally. This behavior often causes versioning conflicts and runtime errors when activating add-ins that expect a different version of the library.</SPAN></P><P><SPAN>The lack of assembly isolation becomes particularly problematic in .NET 5+ because, unlike the .NET Framework, it does not support side-by-side loading of different assembly versions in the same AppDomain. This results in unpredictable behavior and compatibility issues for developers building add-ins for ArcGIS Pro.</SPAN></P><P><SPAN>By implementing </SPAN><SPAN>AssemblyLoadContext</SPAN><SPAN>, introduced in .NET Core, ArcGIS Pro could load each add-in in its own isolated context. This would allow add-ins to load and use their required library versions independently, without interfering with other add-ins. As a result, the stability and compatibility of add-ins would greatly improve.</SPAN></P><P><SPAN>We believe this enhancement would resolve the ongoing versioning conflicts and prevent similar issues with other third-party libraries in the future. It would also align ArcGIS Pro with modern .NET practices for assembly management and dependency isolation.</SPAN></P><P><SPAN>We appreciate your consideration of this request and look forward to seeing potential improvements in this area.</SPAN></P><P><SPAN>Thank you, Johannes Strahler, IP SYSCON</SPAN></P> Wed, 26 Feb 2025 09:15:34 GMT Johannes_Strahler 2025-02-26T09:15:34Z https://community.esri.com/t5/arcgis-pro-sdk-ideas/implement-assemblyloadcontext-for-add-in-isolation/idi-p/1589344 <P><SPAN>We would like to request the implementation of </SPAN><SPAN>AssemblyLoadContext</SPAN><SPAN> in ArcGIS Pro to improve add-in isolation and prevent assembly version conflicts.</SPAN></P><P><SPAN>Currently, ArcGIS Pro loads all add-ins into the same AppDomain, which means that when different add-ins depend on different versions of the same third-party library (like Log4Net or Gdal), only the highest version is loaded and used globally. This behavior often causes versioning conflicts and runtime errors when activating add-ins that expect a different version of the library.</SPAN></P><P><SPAN>The lack of assembly isolation becomes particularly problematic in .NET 5+ because, unlike the .NET Framework, it does not support side-by-side loading of different assembly versions in the same AppDomain. This results in unpredictable behavior and compatibility issues for developers building add-ins for ArcGIS Pro.</SPAN></P><P><SPAN>By implementing </SPAN><SPAN>AssemblyLoadContext</SPAN><SPAN>, introduced in .NET Core, ArcGIS Pro could load each add-in in its own isolated context. This would allow add-ins to load and use their required library versions independently, without interfering with other add-ins. As a result, the stability and compatibility of add-ins would greatly improve.</SPAN></P><P><SPAN>We believe this enhancement would resolve the ongoing versioning conflicts and prevent similar issues with other third-party libraries in the future. It would also align ArcGIS Pro with modern .NET practices for assembly management and dependency isolation.</SPAN></P><P><SPAN>We appreciate your consideration of this request and look forward to seeing potential improvements in this area.</SPAN></P><P><SPAN>Thank you, Johannes Strahler, IP SYSCON</SPAN></P> Wed, 26 Feb 2025 09:15:34 GMT https://community.esri.com/t5/arcgis-pro-sdk-ideas/implement-assemblyloadcontext-for-add-in-isolation/idi-p/1589344 Johannes_Strahler 2025-02-26T09:15:34Z https://community.esri.com/t5/arcgis-pro-sdk-ideas/implement-assemblyloadcontext-for-add-in-isolation/idc-p/1593180#M161 <P>Check out this thread.</P><P><A href="https://community.esri.com/t5/arcgis-pro-sdk-ideas/load-arcgis-pro-add-ins-into-their-own/idi-p/1477236#U1477236" target="_blank">https://community.esri.com/t5/arcgis-pro-sdk-ideas/load-arcgis-pro-add-ins-into-their-own/idi-p/1477236#U1477236</A></P> Fri, 07 Mar 2025 00:32:22 GMT https://community.esri.com/t5/arcgis-pro-sdk-ideas/implement-assemblyloadcontext-for-add-in-isolation/idc-p/1593180#M161 vanesch 2025-03-07T00:32:22Z https://community.esri.com/t5/arcgis-pro-sdk-ideas/implement-assemblyloadcontext-for-add-in-isolation/idc-p/1598741#M164 <P>So technically, it sounds like different versions of <A href="https://links.esri.com/webview2-download" target="_blank" rel="noopener"><SPAN class="">Microsoft Edge</SPAN><SPAN>&nbsp;</SPAN>WebView2 Runtime</A><SPAN>&nbsp;(e.g. if you built against a static vs. evergreen install on your development machine) could result in different behavior or unforeseen compatibility errors.</SPAN></P> Mon, 24 Mar 2025 20:02:18 GMT https://community.esri.com/t5/arcgis-pro-sdk-ideas/implement-assemblyloadcontext-for-add-in-isolation/idc-p/1598741#M164 RichardDaniels 2025-03-24T20:02:18Z