Changing Color Of Particular Link Button?

i am using a series of linkbuttons A-z which are dynamically created what i want on the click of each its text color change to something else to make it different from others what i am doing

protected void Page_Init(object sender, EventArgs e)
{
// Adding Dynamically linkbuttons for all alphabets(i.e. A-Z)
for (char asciiValue = 'A'; asciiValue <= 'Z'; asciiValue++)
{
LinkButton lbtnCharacter = new LinkButton();
lbtnCharacter.ID = "lbtnCharacter" + asciiValue;
divAlphabets.Controls.Add(lbtnCharacter);
lbtnCharacter.Text = Convert.ToString(asciiValue);
lbtnCharacter.CssClass = "firstCharacter";
lbtnCharacter.ToolTip = "Show users whose name starts with '" + Convert.ToString(asciiValue) + "'";
lbtnCharacter.CommandArgument = Convert.ToString(asciiValue);
lbtnCharacter.Command += new CommandEventHandler(lbtnCharacter_Command);
}
}
void lbtnCharacter_Command(object sender, CommandEventArgs e)
{
ViewState["Selected_Character"] = e.CommandArgument;
LinkButton lbtn = (LinkButton)divAlphabets.FindControl("lbtnCharacter" + e.CommandArgument);
lbtn.ForeColor = System.Drawing.Color.Orange;
txtNameFilter.Text = string.Empty;
BindUserList();
}

it is working fine but on clicking more then one buttons all the buttons which are clicked changes their color to orange but what i want is whichever button i click only that button color should change on click of next button previous button should go to default state is this approach right or tell me if it can be achieved by css