Getting the (LocalResource) ResourceManager from an asp.net website webform

To get the ResourceManager for LocalResources in a asp.net website webform use this snippet

    protected System.Collections.Hashtable GetLocalResourceStringEntries()
    {
        var localResourceStringEntries = new System.Collections.Hashtable();
        var f = typeof(TemplateControl).GetField("_resourceProvider", BindingFlags.NonPublic | BindingFlags.Instance);
        if (f == null)
            return localResourceStringEntries;
        var resourceProvider = (System.Web.Compilation.IResourceProvider)f.GetValue(this);
        if (resourceProvider.ResourceReader == null)
            return localResourceStringEntries;
        foreach (System.Collections.DictionaryEntry de in resourceProvider.ResourceReader)
        {
            if (de.Value is String)
                localResourceStringEntries[de.Key] = de.Value;
        }
        return localResourceStringEntries;
    }