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ItemCollection.Add Method

Adds an item to the ItemCollection.

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

public int Add(
	Object newItem
)

Parameters

newItem
Type: System.Object

The item to add to the collection.

Return Value

Type: System.Int32
The zero-based index at which the object is added or -1 if the item cannot be added.

Implements

IList.Add(Object)

ExceptionCondition
InvalidOperationException

The item to add already has a different logical parent.

InvalidOperationException

The collection is in ItemsSource mode.

.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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