write a program for display string like JABALPUR

{
Count(null,null);//call
protected void Count(object sender, EventArgs e)
{
string test = "JABALPUR";
List str = new List();
char[] chrs = test.ToCharArray();
string test1 = "JABALPUR";
for (int chrsCount = 1; chrsCount < chrs.Length+1; chrsCount++)
{
test1 = test.Substring(0, chrsCount);

for (int i = 0; i < chrsCount; i++)
{
var s = chrs[i] + " " + Occurence(test1, chrs[i]);
if (str.IndexOf(s) == -1)
{
str.Add(s);
}
}
}

label1.Text = string.Join("\n", str);
}

private int Occurence(string text, char chr)
{
int i = 0, count = 0;
while ((i = text.IndexOf(chr, i)) != -1)
{
count++;
i++;
}
return count;

}