C#

public DoubleBufferedPanel()

string source = "1,2,3,4";
string[] parts = source.Split(',');
Array.Sort(parts);
string result = string.Join(",", parts);

string reversedString = new string("4,3,2,1".Reverse().ToArray());

ViewState["questionumber"] = myquestionumber.Reverse().ToArray();

vkEE wrote:

How did you know we have to create a new variable to do this? The fact we are treating it as new string?

DateTime earliest = arr.Min(record => record.Date);
DateTime latest   = arr.Max(record => record.Date);

List<TimeSpan> dateIntervals = endDates.Select((eDate, ndx) => eDate - startDates[ndx]).ToList();

for (int i = start.Length - 2; i > -1; --i)
{
    if (start[i+1] >= start[i] && start[i+1] <= end[i])
    {
        start[i + 1] = end[i];
    }
}
for (int i = 0; i < start.Length; ++i)
{
    timespan = end[i] - start[i];
    timeDifference += timespan.Days;
}

TreeNode firstSelectedNode;
TreeNode firstSelectedNodeParent;

private void treeView1_BeforeSelect(object sender, TreeViewCancelEventArgs e)
{
    if (firstSelectedNode == null)
    {
        firstSelectedNode = e.Node;
        firstSelectedNodeParent = firstSelectedNode.Parent;
    }
    else
    {
        if (e.Node.Parent != firstSelectedNodeParent) e.Cancel = true;
    }
}