xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="columndefinitions_grid.Window1" Title="ColumnDefinitions Sample"> Grid Column and Row Collections
//File:Window.xaml.vb Imports System Imports System.Windows Imports System.Windows.Controls Imports System.Windows.Documents Namespace columndefinitions_grid Public Partial Class Window1 Inherits Window Private rowDef1 As RowDefinition Private colDef1 As ColumnDefinition Private Sub containsRow(sender As Object, e As RoutedEventArgs) rowDef1 = New RowDefinition() grid1.RowDefinitions.Insert(grid1.RowDefinitions.Count, rowDef1) Console.WriteLine(grid1.RowDefinitions.IndexOf(rowDef1).ToString()) If grid1.RowDefinitions.Contains(rowDef1) Then Console.WriteLine("Grid Contains RowDefinition rowDef1") Else Console.WriteLine("Grid Does Not Contain RowDefinition rowDef1") End If End Sub End Class End Namespace