对字符串中的字符从小到大进行排序, 即按照字符串中字符的ASCII码的大小排序，ASCII码小的在前，大的在后

String text = "zoalfjnbdswfte";//要排序的字符串的值
char[] chars = text.ToCharArray();
text = "";
for (int i = 0; i < chars.Length; i++)
{
for (int y = i+1; y < chars.Length; y++)
{
if (chars[i] > chars[y])
{
char temp = chars[i];
chars[i] = chars[y];
chars[y] = temp;
}
}
text += chars[i];
}
Console.WriteLine(text);