[PersistenceModeAttribute(PersistenceMode.InnerProperty)]
public AnimationSettings CollapseAnimation { get; }

<PersistenceModeAttribute(PersistenceMode.InnerProperty)> 
Public ReadOnly Property CollapseAnimation As AnimationSettings
	Get

public:
[PersistenceModeAttribute(PersistenceMode::InnerProperty)]
property AnimationSettings^ CollapseAnimation {
	AnimationSettings^ get ();
}

[<PersistenceModeAttribute(PersistenceMode.InnerProperty)>]
member CollapseAnimation : AnimationSettings with get

Property Value

Use the CollapseAnimation property to customize the expand animation of KaxTreeView. You can specify the Type and Duration.
To disable expand animation effects you should set the Type to AnimationType.None. To customize the expand animation you can use the ExpandAnimation property.

ASPX:

<kettic:KaxTreeView ID="KaxTreeView1" runat="server">

<CollapseAnimation Type="OutQuint" Duration="300" />

<Nodes>

<kettic:KaxTreeViewNode Text="News" >

<Nodes>

<kettic:KaxTreeViewNode Text="CNN" NavigateUrl="http://www.cnn.com" />

<kettic:KaxTreeViewNode Text="Google News" NavigateUrl="http://news.google.com" />

</Nodes>

</kettic:KaxTreeViewNode>

<kettic:KaxTreeViewNode Text="Sport" >

<Nodes>

<kettic:KaxTreeViewNode Text="ESPN" NavigateUrl="http://www.espn.com" />

<kettic:KaxTreeViewNode Text="Eurosport" NavigateUrl="http://www.eurosport.com" />

</Nodes>

</kettic:KaxTreeViewNode>

</Nodes>

</kettic:KaxTreeView>

void Page_Load(object sender, EventArgs e)
{
    KaxTreeView1.CollapseAnimation.Type = AnimationType.Linear;
    KaxTreeView1.CollapseAnimation.Duration = 300;
}

Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    KaxTreeView1.CollapseAnimation.Type = AnimationType.Linear
    KaxTreeView1.CollapseAnimation.Duration = 300
End Sub

Reference