The file is log4net-1.2.10-bin.zip . It contains the 1.2.10.0 assembly.

I need to get specifically for a legacy project. The official Apache site now defaults to much newer versions (2.x), and I can’t simply upgrade due to compatibility constraints.

Hi everyone,

Make sure to verify the signature if you’re using it in production. Also note that 1.2.10.0 is the file version as shown in DLL properties – the release is just called 1.2.10.

Here’s a clear, helpful forum-style post you can use or adapt: Where to download log4net version 1.2.10.0?