My Web Service contains a set of methods. Some of them require to do the same process at first. This is an example of some methods:

    Public Shared Function GetMessage(ByVal tdDate As Date, ByVal tnForum As Integer) As String
    DoCommonProcess()
    Return ""
    End Function

    Public Shared Function GetCategory(ByVal tnForum As Integer) As String
    DoCommonProcess()
    Return ""
    End Function

Assuming DoCommonProcess() exists such as defined here:

Imports Microsoft.VisualBasic

Public Class Common

    Public Shared Function DoCommonProcess() As Boolean
        Return True
    End Function

End Class

How would I have to adjust each Web Service method that need to inherit from Common.DoCommonProcess()?