csharp datetime get number of week

Code Example - csharp datetime get number of week

                
                        using System.Globalization

ISOWeek.GetWeekOfYear(DateTime date);
                    
                
 

how to validate if date is a weekday or weekend csharp

                        
                                DayOfWeek today = DateTime.Today.DayOfWeek;
if (today == DayOfWeek.Sunday || today == DayOfWeek.Saturday)
{
  ClientScript.RegisterStartupScript(GetType(), "alert", "alert('" weekend"');", true);
}
else
{
    ClientScript.RegisterStartupScript(GetType(), "alert", "alert('" weekday"');", true);
}