ListViewGroupCollection.Contains Method (ListViewGroup)


Determines whether the specified group is located in the collection.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public bool Contains(
	ListViewGroup value


Type: System.Windows.Forms.ListViewGroup

The ListViewGroup to locate in the collection.

Return Value

Type: System.Boolean

true if the group is in the collection; otherwise, false.

You cannot add a ListViewGroup to the collection more than once. However, attempting to add another copy will not throw an exception. Instead, the addition will simply fail. The Add method will return a value of –1 in this case. The AddRange and Insert methods, however, do not have return values. When adding groups using one of these methods, use the Contains method to determine whether a particular ListViewGroup is already in the collection.

.NET Framework
Available since 2.0
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