ProBuilder Merge Faces at Runtime

Hello everyone!

I'm curious if it's possible to merge faces of a ProBuilderMesh at runtime?
When I create a Mesh with this code:

Code (CSharp):

1. quad = ProBuilderMesh.Create(
2.             new Vector3[] {
3.                 new Vector3(0f,0f,0f),
4.                 new Vector3(1f,0f,0f),
5.                 new Vector3(0f,1f,0f),
6.                 new Vector3(1f,1f,0f),
7.                 new Vector3(0f,0f,0f),
8.                 new Vector3(1f,0f,0f),
9.                 new Vector3(0f,1f,0f),
10.                 new Vector3(1f,1f,0f),
11.             },
12.             new Face[] {
13.                 new Face(new int[] {0,2,1}),
14.                 new Face(new int[] {2,3,1}),
15.                 new Face(new int[] {5,6,4}),
16.                 new Face(new int[] {5,7,6}),
17.             });
18.  
19.         Debug.Log("Quad faces: " + quad.faces.Count);
20.         quad.SetMaterial(quad.faces, quadMaterial);
21.         quad.Refresh();
22.         quad.ToMesh();

the faces of the Quad are split into 2 parts (2 triangles at front and back) but that makes the extrusion a bit complicated, so I would like to merge those faces into one and then extrude it dynamically at runtime. But I couldn't find any good option for merging, the only method that looked like it could help is the ProBuilderMesh.MergeVertices() method but I couldn't get it to work. Any suggestions?