Why Can't My .NET 4.0 Application Load My DLL, and How Can I Fix the '0x8007007E' Error?

Troubleshooting .NET 4.0 DLL Loading Errors

Your ".NET 4.0 application cannot load DLL" error ("The specified module could not be found. (Exception from HRESULT: 0x8007007E)") indicates a problem with the DLL's location or dependencies. Let's explore the solution.

Windows searches for DLLs in a specific order:

1. The application's directory.
2. The system directory (System32 or SysWOW64).
3. Directories listed in the PATH environment variable.

First, confirm your DLL is in one of these locations. Using a dependency analysis tool like Dependency Walker can identify any missing dependencies within your DLL.

Your attempts to load the DLL using DllImport and DllImportAttribute highlight potential issues. The DllImport method should work if the DLL is in the application's bin directory. However, DllImportAttribute requires the DLL's full path, which wasn't specified in your original query.

Additionally, ensure your DLL is correctly built and all its dependencies are met. These dependencies are usually found in the assembly manifest or, again, using Dependency Walker. All dependent DLLs must be present in the application's directory or system directories.

The above is the detailed content of Why Can't My .NET 4.0 Application Load My DLL, and How Can I Fix the '0x8007007E' Error?. For more information, please follow other related articles on the PHP Chinese website!