[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 KaxNavigationBar. You can specify the Type, Duration and the items are collapsed.
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:KaxNavigationBar ID="KaxNavigationBar1" runat="server">

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

<Items>

<kettic:KaxNavigationBarItem Text="News" >

<Items>

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

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

</Items>

</kettic:KaxNavigationBarItem>

<kettic:KaxNavigationBarItem Text="Sport" >

<Items>

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

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

</Items>

</kettic:KaxNavigationBarItem>

</Items>

</kettic:KaxNavigationBar>

void Page_Load(object sender, EventArgs e)
{
    KaxNavigationBar1.CollapseAnimation.Type = AnimationType.Linear;
    KaxNavigationBar1.CollapseAnimation.Duration = 300;
}

Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    KaxNavigationBar1.CollapseAnimation.Type = AnimationType.Linear
    KaxNavigationBar1.CollapseAnimation.Duration = 300
End Sub

Reference