Method to return all loadable types in an assembly. See [this blog post](http://haacked.com/archive/2012/07/23/get-all-types-in-an-assembly.aspx) for details.

GetLoadableTypes.cs

public static IEnumerable<Type> GetLoadableTypes(this Assembly assembly)
{
    if (assembly == null) throw new ArgumentNullException("assembly");
    try
    {
        return assembly.GetTypes();
    }
    catch (ReflectionTypeLoadException e)
    {
        return e.Types.Where(t => t != null);
    }
}