Print a list of numbers from 1 to 50 in the column

I use:

public static string GoFlig() { List<int> sv = new List<int>(); for (int i = 1; i < 50; i++) { sv.Add(i); } return string.Join(" ", sv.ToArray()); } 

I call the function as html table)

 using (StreamWriter vas = new StreamWriter(Log, false, Encoding.UTF8)) { vas.WriteLine("<tr><td style=\"color:#85AB70; width:33.3%; border:2px solid #707070; text-align: center\"><div style=\"height: 31px;line-height: 31px\"><center>{0}</center></p></div></td>", GoFlig()); } 

But it turns out like this:

Tell me where to put the for loop so that it returns values:
In the end, I should get this:

one
2
3
four
etc

Addition The result of the work proposed by @Foggy Finder,