Extracting mesh from a recast graph

MeshExtractor.cs

using System.Collections;
using System.Collections.Generic;
using Pathfinding;
using UnityEngine;

public class MeshExtractor
{
    public MeshExtractor()
    {
        // Assuming a valid recast graph exists...
        var tiles = (AstarPath.active.graphs[0] as RecastGraph).GetTiles();

        var tileMeshGos = new List<GameObject>();
        foreach (var navmeshTile in tiles)
        {
            var mesh = new Mesh();
            mesh.name = "tmpNavMesh";
            var verts = new Vector3[navmeshTile.verts.Length];
            for (var j = 0; j < navmeshTile.verts.Length; j++)
            {
                verts[j] = (Vector3)navmeshTile.verts[j];
            }
            mesh.vertices = verts;
            mesh.triangles = navmeshTile.tris;
            mesh.RecalculateBounds();
            mesh.RecalculateNormals();

            var tempGo = new GameObject("TempMeshGo");
            tempGo.AddComponent<MeshFilter>().mesh = mesh;
            tileMeshGos.Add(tempGo);

        }

        var combineInstances = new List<CombineInstance>();
        foreach (var tileMeshGo in tileMeshGos)
        {
            combineInstances.Add(new CombineInstance()
            {
                mesh = tileMeshGo.GetComponent<MeshFilter>().mesh,
                transform = tileMeshGo.transform.localToWorldMatrix
            });
        }

        var go = new GameObject("RecastMesh");
        go.AddComponent<MeshFilter>().mesh = new Mesh();
        go.GetComponent<MeshFilter>().mesh.CombineMeshes(combineInstances.ToArray());
        go.AddComponent<MeshCollider>().sharedMesh = go.GetComponent<MeshFilter>().mesh;

        foreach (var tileMeshGo in tileMeshGos)
        {
            Object.Destroy(tileMeshGo);
        }

    }
}