Since this is a legacy dependency specifically bundled with the , you can obtain it through the following methods:
: If you have Crystal Reports for Visual Studio installed, the DLL is often located in the Global Assembly Cache (GAC) or the installation folder, typically under %windir%\assembly . Common Fixes for Deployment Errors
: You can download the package directly from NuGet. Note that you may need to rename the .nupkg file to .zip to extract the specific DLL.
If you are still seeing the error after downloading the file, try these standard solutions used by developers on Stack Overflow : Error: Could not load log4net assembly - Stack Overflow
The error typically occurs when using SAP Crystal Reports . This specific version of the Apache log4net assembly is a custom build provided by SAP; it is not the standard version found on the official Apache website, which uses a different public key token. Where to Download the Correct DLL
: The safest way to ensure the assembly is available is to install the latest Crystal Reports Runtime for your environment (32-bit or 64-bit) from the SAP Support Portal.