Get location of Assembly DLL in Revit 2025 / .net 8

[stj4M66M]

Hi

I would like to get the location of the DLL file, because I need to read another file placed in the same folder.

In .net framework 4.8 I've used Assembly.GetExecutingAssembly().Location, but it return an empty string in .net 8.

I also tried AppDomain.CurrentDomain.BaseDirectory but it returns the directory of Revit.exe.

Any suggestions?

[jeremy_tammik · Accepted solution]

https://duckduckgo.com/?q=GetExecutingAssembly+Location+.net+core

[Speed_CAD · Accepted solution]

Hi stj4M66M,

CodeBase may be deprecated in future versions of .NET, but it still works on .NET 8, try this:

string location = new Uri(System.Reflection.Assembly.GetExecutingAssembly().CodeBase).LocalPath;

[stj4M66M]

Thanks.

System.Reflection.Assembly.GetExecutingAssembly().CodeBase

Is working.
I already tried that earlier, but it returned "C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.7\System.Private.CoreLib.dll". Now I learned, that it was because I ran the plugin from the Add-in Manager. I didn't know that it executes the code in another way.

When I run the code via Add-in/ribbon button I am able to get the assembly location.

Thank you for your help.

Regards Steffen

[esatis]

I have same problem. Any idea how to get assembly location when running from Add-in Manager?

[ricaun]

Add-in Manager probably is loading the your dll file in the memory using something like this:

byte[] assemblyBytes = File.ReadAllBytes("YourAssembly.dll");
Assembly loadedAssembly = Assembly.Load(assemblyBytes);

This make the assembly in the memory instead of a physical file, and make the location empty and the physical file does not lock in the process.

That how it works. 🤘

[stj4M66M]

I havn't found a solution. I ended up creating a ribbon-button.