public override void Execute()
{
var grouplist = _persistance.GetGroupList();
var groups = new List <string>();
foreach (Group group in grouplist)
{
string groupstring = string.Format("{0} ({1})", group.GroupName, group.Members.Count);
groups.Add(groupstring);
}
string message = string.Join(", ", groups);
Messages.Add("Displaying all groups with the total number of users:");
Messages.Add(message);
}