DateTime - FirstDayOfWeek
A DateTime extension method that first day of week.
public static void Main() { DateTime date = DateTime.Now; Console.WriteLine("Original DateTime : {0}", date.ToFullDateTimeString()); // C# Extension Method: DateTime - FirstDayOfWeek DateTime endOfDay = date.FirstDayOfWeek(); Console.WriteLine("DateTime after calling FirstDayOfWeek: {0}", endOfDay.ToFullDateTimeString()); }
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using System; public static partial class Extensions { /// <summary> /// A DateTime extension method that first day of week. /// </summary> /// <param name="this">The @this to act on.</param> /// <returns>A DateTime.</returns> public static DateTime FirstDayOfWeek(this DateTime @this) { return new DateTime(@this.Year, @this.Month, @this.Day).AddDays(-(int) @this.DayOfWeek); } }