Mef Component Dll [verified] | Still Unable To Load

catch (Exception ex)

This is the most common cause. Your MEF component DLL (let's call it MyPlugin.dll ) might be loading correctly, but it relies on ThirdPartyLibrary.dll . If MyPlugin.dll requires version 2.0 of the library, but the host application or another plugin has already loaded version 1.0, MEF may fail to load the component. still unable to load mef component dll

Review the generated log. It will show exactly which DLL failed and the raw exception text. catch (Exception ex) This is the most common cause