/// <summary>
 /// Gets the category for the specified property.
 /// </summary>
 /// <param name="pd">The property descriptor.</param>
 /// <param name="declaringType">The declaring type.</param>
 /// <returns>
 /// A category string.
 /// </returns>
 protected virtual string GetCategory(PropertyDescriptor pd, Type declaringType)
 {
     return pd.GetCategory();
 }