Using Enterprise Library 5 with Sharepoint 2013 could be a tricky. A strange exception is thrown from Validation block of EntLib when it's used from Sharepoint:
Microsoft.Practices.ServiceLocation.ActivationException: Activation error occured while trying to get instance of type ValidatorFactory, key "" ---> Microsoft.Practices.Unity.ResolutionFailedException: Resolution of the dependency failed, type = "Microsoft.Practices.EnterpriseLibrary.Validation.ValidatorFactory", name = "(none)". Exception occurred while: while resolving. Exception is: InvalidOperationException - The type ValidatorFactory does not have an accessible constructor. ----------------------------------------------- At the time of the exception, the container was: Resolving Microsoft.Practices.EnterpriseLibrary.Validation.ValidatorFactory,(none) ---> System.InvalidOperationException: The type ValidatorFactory does not have an accessible constructor.
The solution is to add the following configuration elements into web.config:
1. Add a section declaration into <configSections>
<section name="typeRegistrationProvidersConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Common.Configuration.TypeRegistrationProvidersConfigurationSection, Microsoft.Practices.EnterpriseLibrary.Common, Version=5.1.508.0, Culture=neutral, PublicKeyToken=3602034a0e4e3f13" />
2. Add the section into <configuration>
<typeRegistrationProvidersConfiguration>
<remove name="Validation" />
<add name="Validation" providerType="Microsoft.Practices.EnterpriseLibrary.Validation.Configuration.ValidationTypeRegistrationProvider, Microsoft.Practices.EnterpriseLibrary.Validation, Version=5.1.508.0, Culture=neutral, PublicKeyToken=3602034a0e4e3f13" />
</typeRegistrationProvidersConfiguration>
