Sort an Arraylist holding an array of a custom class object of Orders

I need to sort an arraylist which holds a array of objects called orders.
Orders has a property called OrderDate and a List Of testCodes.
I want to sort the Araylist in asc OrderDate
here is some code snippet on how the arraylist gets populated

Dim deliveryOrders as New Arraylist
Dim orders as Orders
Dim orders.TestCodes - new List(of testcodes)
order .OrderDate = '3/1/2001'
blah blah blah

deliveryOrders.Add(orders)
 Need to sort this deliveryOrders arraylist

Public Class Order    
    Private _OrderDate As String   
    Private _Tests As List(Of TestCodes)
	
	Public Property CollectionDate() As String
        Get
            Return _CollectionDate
        End Get
        Set(ByVal value As String)
            _CollectionDate = value
        End Set
    End Property
	
    Public Property Tests() As List(Of TestCodes)
        Get
            Return _Tests
        End Get
        Set(ByVal value As List(Of TestCodes))
            _Tests = value
        End Set
    End Property
End Class

Public Class TestCodes
    Private _TestCode As String
    Private _Description As String
   
    Public Property TestCode() As String
        Get
            Return _TestCode
        End Get
        Set(ByVal value As String)
            _TestCode = value
        End Set
    End Property
    Public Property Description() As String
        Get
            Return _Description
        End Get
        Set(ByVal value As String)
            _Description = value
        End Set
    End Property


End Class

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