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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
)

Parameters

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();
    sp1.Children.Add(txt1);
    txt1.Text = "This StackPanel contains UIElement btn1: " + sp1.Children.Contains(btn1).ToString();
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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