How to set camera positions maunally in cs file in WPF 3D when it is rotated by mouse I have used camera.transform=mouse.transform property

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C#

WPF

i have created a 3D object in wpf 3d and used prospective camera the positions are changed by mouse move event.

below are the xaml code

  d:DesignHeight="300" d:DesignWidth="600">
<Grid Name="objGrid" MouseDown="Grid_MouseDown" MouseUp="Grid_MouseUp" MouseMove="Grid_MouseMove"  Focusable="True">

    <Border Name="border" Background="White" MouseDown="border_MouseDown"
    BorderBrush="White"
    BorderThickness="2"
    CornerRadius="0"
    Padding="25"  Margin="0,-21,0,10">

        <Viewport3D Name="mainViewPort"  ClipToBounds="True" Opacity="10">
            <Viewport3D.Camera >
                <PerspectiveCamera x:Name="camera"
      FarPlaneDistance="100"
      LookDirection="0, 0, -5"
      UpDirection="0,1,0"
      NearPlaneDistance="1"
      Position="0, 0, 5"
      FieldOfView="50" />
            </Viewport3D.Camera>
            <ModelVisual3D>
                <ModelVisual3D.Content>
                    <AmbientLight x:Name="directionLightOfMainViewPort" Color="White"/>
                </ModelVisual3D.Content>
            </ModelVisual3D>
        </Viewport3D>

i want to manually set the camera position in a button click event.
i.e, i want that faces of the object appear in button click event .

What I have tried:

i want to do it on cs file not in xaml...

i had tried following code..

TranslateTransform3D obj = new TranslateTransform3D();
            //solidCubeMV3D.Transform.Value.OffsetX = 0;

             //camera.Reset();
            //Vector3D lookDirection = new Vector3D(0, 0, -5);
            Vector3D updirection = new Vector3D(0, 1, 0);
            Point3D position = new Point3D(0, 0, 5);
            //camera.LookDirection = lookDirection;
            camera.UpDirection = updirection;
            camera.Position = position;           
                //camera.ChangeDirection(new Vector3D(0, 0, -5),new Vector3D(0,1,0),0.5);           
             mainViewPort.Camera = this.camera;
            
              // camera.Transform = new Transform3DGroup();
             //camera.Transform = trackball.Transform;           
            //solidCubeMV3D.Transform = camera.Transform;   
           //  trackball.EventSource = objGrid;
          //  camera.Transform = trackball.Transform;
         // objGrid.MouseWheel += new System.Windows.Input.MouseWheelEventHandler(objGrid_MouseWheel);      

please help me how to do as i am new to wpf