private static Type CreateWeakProviderType()
{
var assembly = new DynamicAssembly();
var dynamicType = assembly.DynamicType("WeakProviderFactory").HasBaseClass(typeof(DbProviderFactory));
dynamicType.CtorAccess = MemberAccess.Public;
dynamicType.Field("Instance").HasType(dynamicType).IsStatic().IsInstance();
var compiledAssembly = assembly.Compile(new AssemblyName("ProviderAssembly"));
// We need this so that Type.GetType() used in DbProviderFactories.GetFactory will work for
// the dynamic assembly. In other words, this is only needed for the test code to work.
AppDomain.CurrentDomain.AssemblyResolve +=
(sender, args) => args.Name.StartsWith("ProviderAssembly") ? compiledAssembly : null;
return assembly.GetType("WeakProviderFactory");
}