Ermittelt alle Gruppenmitgliedschaften eines Users auf einem

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/// <summary>
/// Ermittelt alle Gruppenmitgliedschaften eines Users auf einem Remotesystem
/// </summary>
/// <param name="ComputerName"></param>
/// <param name="UserName"></param>
/// <returns></returns>
public static Dictionary<string, string> GetLocalGroupMemberShip(string ComputerName, string UserName)
{
    Dictionary<string, string> LocalGroups = new Dictionary<string, string>();
    ManagementObjectSearcher mos = new ManagementObjectSearcher("SELECT * FROM Win32_Group WHERE LocalAccount = TRUE");
    ManagementScope ms = new ManagementScope("\\\\" + ComputerName + "\\root\\cimv2");
    mos.Scope = ms;
    try
    {
        mos.Scope.Connect();
    }
    catch (Exception)
    {
        return null;
    }

    foreach (ManagementObject mo in mos.Get())
    {
        ManagementObjectSearcher userSearcher = new ManagementObjectSearcher("SELECT * FROM Win32_GroupUser Where GroupComponent = \"Win32_Group.Domain=\'" + ComputerName + "\',Name=\'" + mo["Name"] + "\'\"");
        userSearcher.Scope = ms;
        try
        {
            userSearcher.Scope.Connect();
            foreach (ManagementObject userObject in userSearcher.Get())
            {
                string UName = userObject["PartComponent"].ToString();
                UName = UName.Substring(UName.IndexOf("=") + 1);
                string Domain = UName.Substring(0, UName.IndexOf((","))).Replace("\"", "");
                UName = UName.Substring(UName.IndexOf("=") + 1).Replace("\"", "");
                if (UName.IndexOf(UserName, 0, StringComparison.OrdinalIgnoreCase) == 0)
                    LocalGroups.Add(mo["Name"].ToString(), Domain + "\\" + UName);
            }
        }
        catch (Exception)
        {
        }
    }
    return LocalGroups;
}