Parse the route attribute names out of route templates e.g. /main/view/{id}

ParseRouteParameters.cs

private static IEnumerable<string> GetRouteParameters(RouteAttribute route)
{
    for (int i = 0; i < route.Template.Length; i++)
    {
        if (route.Template[i] != '{')
            continue;
        i++;
        for (int j = i; j < route.Template.Length; j++)
        {
            if (route.Template[j] != '}')
                continue;
            else
            {
                yield return route.Template[i..j];
                i = j;
                break;
            }
        }
    }
}