Red Black Tree Top-Down Del No Red child.cs

//if there is no red nodes under X so we have to check childrens of sibling of X
                else
                {
                    //if sibling is on the left side so you have to make double rotation
                    if (isRed(s.left) && treeDirection == TreeDirection.Right)
                    {
                        //left left ->single rotation
                        RotateRight(s, s.parent);
                        TreeColor temp = p.treeColor;
                        p.treeColor = TreeColor.Black;
                        x.treeColor = temp;
                        s.treeColor = temp;
                        if(s.right != null)
                            s.right.treeColor = TreeColor.Black;
                    }

                    else if (isRed(s.right) && treeDirection == TreeDirection.Right)
                    {
                        //left right ->double
                        SingleLeftRotation(s.right, s, s.parent);
                        RotateRight(s.right, s);
                        x.treeColor = TreeColor.Red;
                        p.treeColor = TreeColor.Black;

                    }
                    else if (isRed(s.right) && treeDirection == TreeDirection.Left)
                    {
                        //right right -> single rot
                        RotateLeft(s, s.parent);
                        TreeColor temp = p.treeColor;
                        p.treeColor = TreeColor.Black;
                        x.treeColor = temp;
                        s.treeColor = temp;
                        if(s.left!=null)
                            s.left.treeColor = TreeColor.Black;
                    }
                    else if (isRed(s.left) && treeDirection == TreeDirection.Left)
                    {
                        //right left -> double
                        SingleRightRotation(s.right, s, s.parent);
                        RotateRight(s.right, s);
                        x.treeColor = TreeColor.Red;
                        p.treeColor = TreeColor.Black;
                    }
                    else
                    {
                        //all childrens of s are black recolor p,x,s
                        TreeColor temp = x.parent.treeColor;
                        x.parent.treeColor = x.treeColor;
                        x.treeColor = temp;
                        s.treeColor = temp;
                    }
                }
            }
            root.treeColor = TreeColor.Black;
        }