Loading Data Async

I am try to load some of my data asynchronously using the code below.   But I am getting the error.

Cross-thread operation not valid: Control 'dg_Contacts' accessed from a thread other than the thread it was created on.

Private M_LoadContactAsync As WCF_Contacts.Contact.DelLoadContact

    Public Sub LoadContactAsync()
        M_LoadContactAsync = AddressOf Me.Contact.LoadContacts
        M_LoadContactAsync.BeginInvoke(Me.M_OrgID, AddressOf CallBackLoadAddress, Nothing)
    End Sub
    Public Sub CallBackLoadAddress(ByVal r As IAsyncResult)
        Me.Contacts = Me.M_LoadContactAsync.EndInvoke(r)
        Me.dg_Contacts.DataSource = Me.Contacts
    End Sub

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