Why Does My Project Show 'The type '...' is defined in an assembly that is not referenced' Despite the Assembly Existing in App_Code?

Understanding the "Type is Defined in an Assembly That Is Not Referenced" Error

When encountering the error "The type 'Project.Rights.OperationsProvider' is defined in an assembly that is not referenced", it's essential to delve into the underlying cause. Unlike common suggestions related to deleting assembly instances and checking build actions, the solution might lie in a more nuanced issue.

The error message clearly indicates that a referenced assembly is missing. However, in this specific case involving App_Code, the application fails to recognize the type in the App_Code directory. To rectify this, consider the possibility that an overload of a constructor or method within the referenced type references an additional type that has not been included in the assembly reference.

For instance, a method may have an overload that accepts a parameter of a certain type. If that type is not referenced in the assembly, the compiler will issue this error. To resolve this issue, add the necessary assembly reference to the project to include the missing type.

The above is the detailed content of Why Does My Project Show 'The type '...' is defined in an assembly that is not referenced' Despite the Assembly Existing in App_Code?. For more information, please follow other related articles on the PHP Chinese website!