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UIElementCollection.Contains Method

Determines whether a specified element is in the UIElementCollection.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

public virtual bool Contains(
	UIElement element


Type: System.Windows.UIElement
The element to find.

Return Value

Type: System.Boolean
true if the specified UIElement is found in the collection; otherwise, false.

The following example uses the Contains method to determine if a specific UIElement exists within a UIElementCollection.

void ContainsElement(object sender, RoutedEventArgs e)
    TextBlock txt1 = new TextBlock();
    txt1.Text = "This StackPanel contains UIElement btn1: " + sp1.Children.Contains(btn1).ToString();

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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