The located assembly's manifest definition does not match the assembly reference

In my case this was the issue with Referencing of Log4net Dll.

My web was using absolute reference of Log4net Dll from shared assebmlies folder and was also consuming another Library(Email Template for sending Emails which was also using log4net Dll)

so that was the reason for conflict between them, after investigating a lot i found that EmailProcessor was referencing log4net , not from shared folder but from its own bin folder .

so issue was fixed by deleting bin folder of EmailProcessor and adding the correct reference of Log4net Dll to project.