This example provides a read-only property named TimeNow. The Properties window displays it as a grayed-out, non-editable property that shows the current time including seconds.

The RefreshesAll property has RefreshProperties set to All. When you modify this property's value, the Properties window reloads all other property values and you can see the value of TimeNow change.

Public ReadOnly Property TimeNow() As String
    Get
        Return Now.ToString("h:mm:ss")
    End Get
End Property

Private m_RefreshesAll As String

<RefreshProperties(RefreshProperties.All)> _
Public Property RefreshesAll() As String
    Get
        Return m_RefreshesAll
    End Get
    Set(ByVal Value As String)
        m_RefreshesAll = Value
    End Set
End Property