[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 KaxMenu. 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:KaxMenu ID="KaxMenu1" runat="server">

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

<Items>

<kettic:KaxMenuItem Text="News" >

<Items>

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

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

</Items>

</kettic:KaxMenuItem>

<kettic:KaxMenuItem Text="Sport" >

<Items>

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

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

</Items>

</kettic:KaxMenuItem>

</Items>

</kettic:KaxMenu>

void Page_Load(object sender, EventArgs e)
{
    KaxMenu1.CollapseAnimation.Type = AnimationType.Linear;
    KaxMenu1.CollapseAnimation.Duration = 300;
}

Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    KaxMenu1.CollapseAnimation.Type = AnimationType.Linear
    KaxMenu1.CollapseAnimation.Duration = 300
End Sub

Reference