How Do I Use Farsilibrary.Win.Dll?

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C#

Hi,
i have a windows application . i want to use FarsiLibrary to have a persian DateTime control in form.
but i can't use it, because i has error:

error CS0246: The type or namespace name 'FarsiLibrary' could not be found (are you missing a using directive or an assembly reference?)

i just add the 'FarsiLibrary.Win.dll' to References and add this code:

using FarsiLibrary;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
         private FarsiLibrary.Win.Controls.FADatePickerConverter faDatePickerConverter;

        // other code
     }
}

i use this link:
Farsi Library - Working with Dates, Calendars, and DatePickers[^]

please help me.