<ComponentModel.EditorBrowsable(ComponentModel.EditorBrowsableState.Never)>

Public Class ClassA
    <ComponentModel.EditorBrowsable(ComponentModel.EditorBrowsableState.Never)> _
    Public Sub MyHiddenMethod()
        'This is a private method which will niether available in Intellisense nor it will
        'be available in Object Browser
    End Sub
    Private Sub Test()
        'This is a private method which will not available in Intellisense but will
        'be available in Object Browser
    End Sub
End Class