Code Snippit : Extension Method to Set date to begin or end of day

Imports System.Runtime.CompilerServices

Module DateExtension
    <Extension()>
    Public Function StartOfDay(ByVal d1 As Date) As Date
        Return Date.Parse(d1.ToString("dd/MM/yyyy 00:00:00"))
    End Function
    <Extension()>
    Public Function EndOfDay(ByVal d1 As Date) As Date
        Return Date.Parse(d1.ToString("dd/MM/yyyy 23:59:59"))
    End Function
End Module