Clean code suggestions requested

/*
* This code is far from done and has tons of issues. All I currently want is suggestions on how to clean up the repetitive code for
* each direction. This is just a snippet from a larger script that will generate a maze.
*
* Variable descriptions:
* dungeon = 2D array of Tiles (either Hallway or Wall)
* currentPos = Vector2Int (properties x and y) declaring the cursors current position in the dungeon
*/
var currentTile = dungeon[currentPos.x, currentPos.y] as HallwayTile;
var leftTile = currentPos.x > 0 ? dungeon[currentPos.x - 1, currentPos.y] : null;
var upTile = currentPos.y > 0 ? dungeon[currentPos.x, currentPos.y + 1] : null;
var rightTile = currentPos.x < dungeonArea.x - 1
    ? dungeon[currentPos.x + 1, currentPos.y]
    : null;
var bottomTile = currentPos.y < dungeonArea.y - 1
    ? dungeon[currentPos.x, currentPos.y - 1]
    : null;

// Calculate backtracking
var numberOfWalls = 0;
if (leftTile is WallTile lwt1 && lwt1.IsBorderingMultiple())
{
    numberOfWalls++;
}
else if (leftTile is WallTile)
{
    canStartDigging = true;
    currentPos.x--;
    dungeon[currentPos.x - 1, currentPos.y] =
        new WallTile(new Vector2Int(currentPos.x - 1, currentPos.y));
}
else if (leftTile is HallwayTile leftHall1 && leftHall1.Backtracked)
{
    numberOfWalls++;
}
else if (leftTile is HallwayTile leftHall2)
{
    currentPos.x--;
}

if (upTile is WallTile uwt1 && uwt1.IsBorderingMultiple())
{
    numberOfWalls++;
}
else if (upTile is WallTile uwt2)
{
    canStartDigging = true;
    currentPos.y++;
    dungeon[currentPos.x, currentPos.y + 1] =
        new WallTile(new Vector2Int(currentPos.x, currentPos.y + 1));
}
else if (upTile is HallwayTile upHall1 && upHall1.Backtracked)
{
    numberOfWalls++;
}
else if (upTile is HallwayTile upHall2)
{
    currentPos.y++;
}

if (rightTile is WallTile rwt1 && rwt1.IsBorderingMultiple())
{
    numberOfWalls++;
}
else if (rightTile is WallTile rwt2)
{
    canStartDigging = true;
    currentPos.x++;
    dungeon[currentPos.x + 1, currentPos.y] =
        new WallTile(new Vector2Int(currentPos.x + 1, currentPos.y));
}
else if (rightTile is HallwayTile rightHall1 && rightHall1.Backtracked)
{
    numberOfWalls++;
}
else if (rightTile is HallwayTile rightHall2)
{
    currentPos.x++;
}

if (bottomTile is WallTile bwt1 && bwt1.IsBorderingMultiple())
{
    numberOfWalls++;
}
else if (bottomTile is WallTile bwt2)
{
    canStartDigging = true;
    currentPos.y--;
    dungeon[currentPos.x, currentPos.y - 1] =
        new WallTile(new Vector2Int(currentPos.x, currentPos.y - 1));
}
else if (bottomTile is HallwayTile bottomHall1 && bottomHall1.Backtracked)
{
    numberOfWalls++;
}
else if (bottomTile is HallwayTile bottomHall2)
{
    currentPos.y--;
}