WPF

public class BadExtension : MarkupExtension
{
    public string A { get; set; }
    public string B { get; set; }

    public BadExtension() { }
    public BadExtension(string a) { this.A = a; }
    public BadExtension(string a, string b) { this.A = a; this.B = b; }

    public override object ProvideValue(IServiceProvider serviceProvider) { return A + B; }
}

<button grid.row="0" content="{l:Bad ItemA}" />
<button grid.row="1" content="{l:Bad ItemA, ItemB}" />

Private Sub BindData()

           Dim conn As SqlConnection = New SqlConnection
           Dim command As SqlCommand
           Dim dataadp As SqlDataAdapter = New SqlDataAdapter
           Dim dtTbl As Data123DataSet = New Data123DataSet
           Dim query As String = "SELECT EntityCode, Title, Name FROM dbo.Entity"
           Dim connstring As String = "Data Source=SRITANU;Initial Catalog=Data123;User ID=sa"
           conn = New SqlConnection(connstring)

           Try
               command = New SqlCommand(query, conn)
               conn.Open()
               dataadp.SelectCommand = command
               dataadp.Fill(dtTbl, "Entity")
               DataContext = dtTbl
           Catch ex As Exception
               conn.Close()
           End Try

       End Sub

<Window x:Class="Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="670" xmlns:c1grid="http://schemas.componentone.com/wpf/C1DataGrid" WindowState="Maximized">
    <Grid Width="574">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="574*" />
            <ColumnDefinition Width="0*" />
        </Grid.ColumnDefinitions>
        <c1grid:C1DataGrid Margin="0,12,0,21" DataContext="{Binding dtTbl}"  Name="C1DataGrid1" ItemsSource="{Binding Path=Data123DataSet.dtTbl, ElementName= Window, Mode=Default}">
            <c1grid:C1DataGrid.Columns>
                <c1grid:Column Caption="CUSTID" ColumnName="EntityCode" PropertyName="EntityCode " />
                <c1grid:Column Caption="TITLE" ColumnName="Title" PropertyName=" Title"/>
                <c1grid:Column Caption="NAME" ColumnName="Name" PropertyName=" Name"/>
            </c1grid:C1DataGrid.Columns>
        </c1grid:C1DataGrid>
    </Grid>
</Window>