Starting with the net_v40_long, the AssemblyName.HashAlgorithm property of an System.Reflection.AssemblyName object that is returned by the Assembly.GetReferencedAssemblies method is System.Configuration.Assemblies.AssemblyHashAlgorithm.None if there is no hash algorithm for the referenced assembly, or if the hash algorithm of the referenced assembly is not identified by the System.Configuration.Assemblies.AssemblyHashAlgorithm enumeration. In previous versions of the .NET Framework, the AssemblyName.HashAlgorithm property returned System.Configuration.Assemblies.AssemblyHashAlgorithm.SHA1 in this situation.