To get the week number you can use:
Calendar.GetWeekOfYear()
See:
Calendar.GetWeekOfYear(DateTime, CalendarWeekRule, DayOfWeek) Method (System.Globalization) | Microsoft Learn[
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Here is some code from the CodeProject article
Converting Numbers to Text in C#[
^]
private static string ConvertDigitToString(int i)
{
switch (i)
{
case 0: return "";
case 1: return "one";
case 2: return "two";
case 3: return "three";
case 4: return "four";
case 5: return "five";
case 6: return "six";
case 7: return "seven";
case 8: return "eight";
case 9: return "nine";
default:
throw new IndexOutOfRangeException(String.Format("{0} not a digit",i));
}
}
private static string ConvertTeensToString(int n)
{
switch (n)
{
case 10: return "ten";
case 11: return "eleven";
case 12: return "twelve";
case 13: return "thirteen";
case 14: return "fourteen";
case 15: return "fiveteen";
case 16: return "sixteen";
case 17: return "seventeen";
case 18: return "eighteen";
case 19: return "nineteen";
default:
throw new IndexOutOfRangeException(String.Format("{0} not a teen", n));
}
}
private static string ConvertHighTensToString(int n)
{
int tensDigit = (int)( Math.Floor((double)n / 10.0));
string tensStr;
switch (tensDigit)
{
case 2: tensStr = "twenty"; break;
case 3: tensStr = "thirty"; break;
case 4: tensStr = "forty"; break;
case 5: tensStr = "fifty"; break;
case 6: tensStr = "sixty"; break;
case 7: tensStr = "seventy"; break;
case 8: tensStr = "eighty"; break;
case 9: tensStr = "ninety"; break;
default:
throw new IndexOutOfRangeException(String.Format("{0} not in range 20-99", n));
}
if (n % 10 == 0) return tensStr;
string onesStr = ConvertDigitToString(n - tensDigit * 10);
return tensStr + "-" + onesStr;
}