pass the string to string array

hi
 i have data set like below
for(int i = 0; i < ds.Tables[0].Rows.Count; i++) {
string[] arry;
string kk=ds.Tables[0].Rows[i][0].ToString();
}
my question is that how to assign the kk variable to arry
so i can store the all element of dataset to array string in C#