c# Web服务引用c#项目引用DLL

Alright, so maybe this is inadvisable, but I'm writing a Web Service for an existing application. I'm trying to use the C# Library we wrote for the project, and that C# Library uses functions from a dll that is not acreated from a .NET project. I know the DLL isn't a problem, because the actual application (A windows form application) that uses the c# Library has no problem performing operations that use this dll, but my web service always crashes when the dll methods are called. The exception is:Alright, so maybe this is inadvisable, but I'm