HowToHandleArabicNumber.cs

Example in C#
var dictionary = new Dictionary<string, string>
            {
                {"٠", "0"},{"١", "1"},{"٢", "2"},{"٣", "3"},
                {"٤", "4"},{"٥", "5"},{"٦", "6"},{"٧", "7"},
                {"٨", "8"},{"٩", "9"},

            };
string digit = input.Substring(this. txtNumber.Text.Length - 1);
char[] NumberChars = "٠١٢٣٤٥٦٧٨٩0123456789".ToCharArray();
int indexOf = digit.IndexOfAny(NumberChars);
if (indexOf == -1)
{
  input = input.Remove(input.Length - 1);
  await DisplayAlert("", "الحروف لا تقبل", "تم");
}
else
{
  if (!string.IsNullOrEmpty(input) && dictionary.ContainsKey(digit)))
   {
      string englishDigit = dictionary[input];
      input = input.Replace(digit, englishDigit);
   }
}