此问题已得到解决。我在我的的web.config一个集引用那里是它与bin文件夹内的装配present之间的版本不匹配：

The issue is resolved. I had a assembly reference in my web.config where there was a version mismatch between it and the assembly present inside the bin folder:

<add assembly="Oracle.DataAccess, Version=4.112.3.0, Culture=neutral, PublicKeyToken=89B483F429C47342"/>