AnimationPath RepeatBehavior="1" not work as expected

[GF-Huang]

Describe the bug

<hc:AnimationPath Data="M 0,0 l 5,5 l 8,-8" Stroke="White" StrokeThickness="2" RepeatBehavior="1"
                  StrokeStartLineCap="Round" StrokeEndLineCap="Round" StrokeLineJoin="Round" />

Expected behavior
The animation only run once then stop.

Screenshots
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Environment (please complete the following information):

• .net: .NET 5
• IDE VS2019
• Version 3.1.0

Additional context
Add any other context about the problem here.

[ghost1372]

Did you try RepeatBehavior="Forever" ?

[GF-Huang]

Forever show me same behavior.

[GF-Huang]

I found that is the Microsoft stupid design.

https://docs.microsoft.com/en-us/dotnet/api/system.windows.media.animation.repeatbehavior?f1url=%3FappId%3DDev16IDEF1%26l%3DZH-CN%26k%3Dk(System.Windows.Media.Animation.RepeatBehavior);k(DevLang-csharp)%26rd%3Dtrue&view=net-5.0

So I use "1x" instead of "1" works well.

[GF-Huang]

But how to holds the animation path after end? Now after finish, the path disappeared.

<hc:AnimationPath Data="M0,0 l4,5 l8,-8" Stroke="White" StrokeThickness="1.5" RepeatBehavior="1x" Duration="0:0:1"
                  StrokeStartLineCap="Round" StrokeEndLineCap="Round" StrokeLineJoin="Round" />

[NaBian]

But how to holds the animation path after end? Now after finish, the path disappeared.

<hc:AnimationPath Data="M0,0 l4,5 l8,-8" Stroke="White" StrokeThickness="1.5" RepeatBehavior="1x" Duration="0:0:1"
                  StrokeStartLineCap="Round" StrokeEndLineCap="Round" StrokeLineJoin="Round" />

after bebe9b8 you can use RepeatBehavior="1x" FillBehavior="HoldEnd"