In silverlight, can you bind to a property that contains parameter? For example, the following doesn’t seem to work. Am I missing something or is this not possible?

C#

private System.Collections.Generic.Dictionary<string, string> ValuesField = new System.Collections.Generic.Dictionary<string, string>();
public string Value {
    get { return ValuesField(FieldName); }
    set { ValuesField(FieldName) = value; }
}

VB

Private ValuesField As New System.Collections.Generic.Dictionary(Of String, String)
Public Property Value(ByVal FieldName As String) As String
        Get
            Return ValuesField(FieldName)
        End Get
        Set(ByVal value As String)
            ValuesField(FieldName) = value
        End Set
End Property

XAML

<TextBox Name="TextBox1" VerticalAlignment="Top" Width="120"Text="{Binding Path=Value[MyField],Mode=TwoWay }"  />