c#怎样将6个字符存入一个空数组？

c#怎样将6个字符存入一个空数组？c#怎样将6个字符存入一个空数组？

string str = "adkfj;laskdg;lhqoiwuerioweutkli";
int strlen = str.Length;
string[] s = new string[6];
for (int i = 0; i < strlen; i++)
{
s[i] =str.Substring(i,1);
}

 string[] arr = new string[s.Length / 6];
for (int i = 0; i < s.Length / 6; i++)
{
arr[i] = s.SubString(i * 6, 6);
}