Add CSS to selected link button inside listview

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C#

ASP.NET

WebForms

CSS3

style

Hello,

I have an asp.net webform application that has a link button inside a listview.
What I want to do is to highlight/change color of the selected button on Itemcommand.
I have tried a lot of solutions with no luck. It changes the color but it doesn't change back when i click another button.

Any help will be so much appreciated.
Thanks
Samira

What I have tried:

I tried to change color of the selected/clicked button on ItemCommand , ItemDataBound and button click.
Link button inside listview:

<asp:ListView runat="server" ID="subs_view" DataSourceID="SubsFilterSqlDataSource" OnItemCommand="subs_view_ItemCommand" OnItemDataBound= "subs_view_ItemDataBound">
 <ItemTemplate>                                                       
    <asp:LinkButton  cssClass="col-md-9 link-btn" runat="server" ID="btnSubs" CommandName="subs" CommandArgument='<%#Eval("code") %>' Text='<%#Eval("SubCat_CountItems") %>' OnClick="btnSubs_Click"> </asp:LinkButton>
 </ItemTemplate>
</asp:ListView>

I tried to change colors in different ways:

protected void subs_view_ItemCommand(object sender, ListViewCommandEventArgs e)
        {   
            if (e.CommandName == "subs")
            {
                
                LinkButton linkbtn = (LinkButton)e.Item.FindControl("btnSubs");                
                linkbtn.ForeColor = System.Drawing.Color.Red;
//the color stays red when clicking another button
            }
        }

protected void btnSubs_Click(object sender, EventArgs e)
        {
            //subs_view.DataBind();
            //LinkButton mybtn = (LinkButton)sender;
            ////mybtn.ForeColor = System.Drawing.Color.Black;
            //mybtn.ForeColor = System.Drawing.Color.Red;
        }

--

protected void subs_view_ItemDataBound(object sender, ListViewItemEventArgs e)
        {
            //LinkButton btnSubs = (LinkButton)e.Item.FindControl("btnSubs");
            //btnSubs.ForeColor = System.Drawing.Color.Black;
        }