private string convertToCharacter(int i)
{
char[] list = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray();
StringBuilder sb = new StringBuilder();
while ((i -1) / 26 != 0)
{
sb.Append(list[i / 26 - 1]);
i = i % 26;
}
i = (i - 1) % 26;
sb.Append(list[i]);
return sb.ToString();
}
{
char[] list = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray();
StringBuilder sb = new StringBuilder();
while ((i -1) / 26 != 0)
{
sb.Append(list[i / 26 - 1]);
i = i % 26;
}
i = (i - 1) % 26;
sb.Append(list[i]);
return sb.ToString();
}