Mesh collider does not change in blend shape

We have solved the problem.

We were able to update meshCollider by using SkinnedMeshRenderer.BakeMesh ().

     var render = GetComponent<SkinnedMeshRenderer>();
     render.SetBlendShapeWeight(0,100f);

     Mesh bakeMesh = new Mesh();
     skinnedMeshRenderer.BakeMesh(bakeMesh);

     var collider = GetComponent<MeshCollider>();
     collider.sharedMesh = bakeMesh;