Here is a possible solution:

string str = "abc,def,hij,klm";
foreach (string s in str.Split( new char[] {','} ))
Response.Write(s);

using System.Text.RegularExpressions;



Regex r = new Regex("(,)"); // Split on hyphens.

string[] s = r.Split("abc,def,ghi,jklm,no,pq,rstuvw,xyz");

string[] s2 = new string[(int)Math.Round((decimal)s.Length/(decimal)2)]; // you
might have to add a 1 to the length, or you might
//as well add it anyway ...it can't hurt

for (int i =0; i<s.Length;i++)

{

if (i % 2 == 0)

s2[i/2] = s[i];

}

for (int i =0; i<s2.Length;i++)

{

Response.Write(s2[i] + "<br>");

}

str = "abc,def,ghi,jklm,no,pq,rstuvw,xyz";

string[] s = str.Split(',');

for (int i =0; i<s.Length;i++)

{

Response.Write(s[i] + "<br>");

}

string[] sArr = str.Split(',');
foreach(string s in sArr)
{
Response.Write(s);
}

Use str.Split(",") to make an array.

Then loop  through the array.