TileMapEditor.OnInspectorGUI C# (CSharp) Method

    public override void OnInspectorGUI()
    {
        TileMap TMap = (TileMap) target;
        DrawDefaultInspector ();
        if (GUILayout.Button ("Import Tiles")) {
            MeshFilter filter = TMap.GetComponent<MeshFilter>();
            if (filter)
                DestroyImmediate(filter, true);
            filter = TMap.gameObject.AddComponent<MeshFilter>();
            filter.mesh = TMap.CreateMesh();
        }
        if (GUILayout.Button ("Generate colliders")) {
            MeshCollider collider = TMap.GetComponent<MeshCollider>();
            if (collider)
                DestroyImmediate(collider, true);
            if(TMap.transform.FindChild("Colliders") != null){
                DestroyImmediate(TMap.transform.FindChild("Colliders").gameObject, true);
            }
            collider = TMap.gameObject.AddComponent<MeshCollider>();
            collider.sharedMesh = TMap.CreateColliderMesh();
        }
    }