/// <summary>
/// Determines whether the specified key contains key.
/// </summary>
/// <param name="key">The key.</param>
/// <returns></returns>
public bool ContainsKey(object key)
{
var additionalKeys = new List <string> {
"LastCheckIn", "Groups"
};
if (additionalKeys.Contains(key.ToStringSafe()))
{
return(true);
}
else
{
return(GroupType.ContainsKey(key));
}
}