Spiral Traverse[Medium] C#

Approach: It is like getting the bunch of inner perimeters, start with 4 constants which maintain 4 corners, Do this will startRow<=endRow && startCol <= endCol start with first row and increment column till <= endColumn, then start with row with it as startRow + 1 till endRow. then to the left with column = endColumn -1 and to the left and then to the top; Do not forget to update the corner values

public static List<int> SpiralTraverse(int[,] array) {
    if(array.GetLength(0) == 0) return new List<int>();
    var result = new List<int> ();
    var startRow = 0;
    var endRow = array.GetLength(0) - 1;
    var startCol = 0;
    var endCol = array.GetLength(1) - 1;
    while(startRow <= endRow && startCol <= endCol){
      for(int col = startCol; col <= endCol; col++){
        result.Add(array[startRow, col]);
      }
      for(int row = startRow + 1; row <= endRow; row++){
        result.Add(array[row, endCol]);
      }
      for(int col = endCol - 1; col >= startCol; col --){
        if(startRow == endRow) break;
        result.Add(array[endRow, col]);
      }
      for(int row = endRow - 1; row > startRow; row--){
        if(startCol == endCol) break;
        result.Add(array[row, startCol]);
      }
      startRow ++;
      endRow--;
      startCol++;
      endCol--;
    }
    return result;
  }