@@ -109,6 +109,27 @@ public string Version
109109 }
110110 }
111111
112+ /// <summary>
113+ /// Private field for the <see cref="LastBackup" /> property.
114+ /// </summary>
115+ private DateTime _lastBackup = DateTime . MinValue ;
116+
117+ /// <summary>
118+ /// Stores the date of the last backup of the settings file.
119+ /// </summary>
120+ public DateTime LastBackup
121+ {
122+ get => _lastBackup ;
123+ set
124+ {
125+ if ( value == _lastBackup )
126+ return ;
127+
128+ _lastBackup = value ;
129+ OnPropertyChanged ( ) ;
130+ }
131+ }
132+
112133 #region General
113134
114135 // General
@@ -1216,7 +1237,7 @@ public ExportFileType IPScanner_ExportFileType
12161237
12171238 #region Port Scanner
12181239
1219- private ObservableCollection < string > _portScanner_HostHistory = new ( ) ;
1240+ private ObservableCollection < string > _portScanner_HostHistory = [ ] ;
12201241
12211242 public ObservableCollection < string > PortScanner_HostHistory
12221243 {
@@ -1231,7 +1252,7 @@ public ObservableCollection<string> PortScanner_HostHistory
12311252 }
12321253 }
12331254
1234- private ObservableCollection < string > _portScanner_PortHistory = new ( ) ;
1255+ private ObservableCollection < string > _portScanner_PortHistory = [ ] ;
12351256
12361257 public ObservableCollection < string > PortScanner_PortHistory
12371258 {
@@ -1246,7 +1267,7 @@ public ObservableCollection<string> PortScanner_PortHistory
12461267 }
12471268 }
12481269
1249- private ObservableCollection < PortProfileInfo > _portScanner_PortProfiles = new ( ) ;
1270+ private ObservableCollection < PortProfileInfo > _portScanner_PortProfiles = [ ] ;
12501271
12511272 public ObservableCollection < PortProfileInfo > PortScanner_PortProfiles
12521273 {
@@ -1400,7 +1421,7 @@ public ExportFileType PortScanner_ExportFileType
14001421
14011422 #region Ping Monitor
14021423
1403- private ObservableCollection < string > _pingMonitor_HostHistory = new ( ) ;
1424+ private ObservableCollection < string > _pingMonitor_HostHistory = [ ] ;
14041425
14051426 public ObservableCollection < string > PingMonitor_HostHistory
14061427 {
@@ -1569,7 +1590,7 @@ public double PingMonitor_ProfileWidth
15691590
15701591 #region Traceroute
15711592
1572- private ObservableCollection < string > _traceroute_HostHistory = new ( ) ;
1593+ private ObservableCollection < string > _traceroute_HostHistory = [ ] ;
15731594
15741595 public ObservableCollection < string > Traceroute_HostHistory
15751596 {
@@ -1999,7 +2020,7 @@ public ExportFileType DNSLookup_ExportFileType
19992020
20002021 #region Remote Desktop
20012022
2002- private ObservableCollection < string > _remoteDesktop_HostHistory = new ( ) ;
2023+ private ObservableCollection < string > _remoteDesktop_HostHistory = [ ] ;
20032024
20042025 public ObservableCollection < string > RemoteDesktop_HostHistory
20052026 {
@@ -2579,7 +2600,7 @@ public double RemoteDesktop_ProfileWidth
25792600
25802601 #region PowerShell
25812602
2582- private ObservableCollection < string > _powerShell_HostHistory = new ( ) ;
2603+ private ObservableCollection < string > _powerShell_HostHistory = [ ] ;
25832604
25842605 public ObservableCollection < string > PowerShell_HostHistory
25852606 {
@@ -2689,7 +2710,7 @@ public double PowerShell_ProfileWidth
26892710
26902711 #region PuTTY
26912712
2692- private ObservableCollection < string > _puTTY_HostHistory = new ( ) ;
2713+ private ObservableCollection < string > _puTTY_HostHistory = [ ] ;
26932714
26942715 public ObservableCollection < string > PuTTY_HostHistory
26952716 {
@@ -2839,7 +2860,7 @@ public string PuTTY_AdditionalCommandLine
28392860 }
28402861 }
28412862
2842- private ObservableCollection < string > _puTTY_SerialLineHistory = new ( ) ;
2863+ private ObservableCollection < string > _puTTY_SerialLineHistory = [ ] ;
28432864
28442865 public ObservableCollection < string > PuTTY_SerialLineHistory
28452866 {
@@ -2854,7 +2875,7 @@ public ObservableCollection<string> PuTTY_SerialLineHistory
28542875 }
28552876 }
28562877
2857- private ObservableCollection < string > _puTTY_PortHistory = new ( ) ;
2878+ private ObservableCollection < string > _puTTY_PortHistory = [ ] ;
28582879
28592880 public ObservableCollection < string > PuTTY_PortHistory
28602881 {
@@ -2869,7 +2890,7 @@ public ObservableCollection<string> PuTTY_PortHistory
28692890 }
28702891 }
28712892
2872- private ObservableCollection < string > _puTTY_BaudHistory = new ( ) ;
2893+ private ObservableCollection < string > _puTTY_BaudHistory = [ ] ;
28732894
28742895 public ObservableCollection < string > PuTTY_BaudHistory
28752896 {
@@ -2884,7 +2905,7 @@ public ObservableCollection<string> PuTTY_BaudHistory
28842905 }
28852906 }
28862907
2887- private ObservableCollection < string > _puTTY_UsernameHistory = new ( ) ;
2908+ private ObservableCollection < string > _puTTY_UsernameHistory = [ ] ;
28882909
28892910 public ObservableCollection < string > PuTTY_UsernameHistory
28902911 {
@@ -2899,7 +2920,7 @@ public ObservableCollection<string> PuTTY_UsernameHistory
28992920 }
29002921 }
29012922
2902- private ObservableCollection < string > _puTTY_PrivateKeyFileHistory = new ( ) ;
2923+ private ObservableCollection < string > _puTTY_PrivateKeyFileHistory = [ ] ;
29032924
29042925 public ObservableCollection < string > PuTTY_PrivateKeyFileHistory
29052926 {
@@ -2914,7 +2935,7 @@ public ObservableCollection<string> PuTTY_PrivateKeyFileHistory
29142935 }
29152936 }
29162937
2917- private ObservableCollection < string > _puTTY_ProfileHistory = new ( ) ;
2938+ private ObservableCollection < string > _puTTY_ProfileHistory = [ ] ;
29182939
29192940 public ObservableCollection < string > PuTTY_ProfileHistory
29202941 {
@@ -3069,7 +3090,7 @@ public int PuTTY_RawPort
30693090
30703091 #region TigerVNC
30713092
3072- private ObservableCollection < string > _tigerVNC_HostHistory = new ( ) ;
3093+ private ObservableCollection < string > _tigerVNC_HostHistory = [ ] ;
30733094
30743095 public ObservableCollection < string > TigerVNC_HostHistory
30753096 {
@@ -3084,7 +3105,7 @@ public ObservableCollection<string> TigerVNC_HostHistory
30843105 }
30853106 }
30863107
3087- private ObservableCollection < int > _tigerVNC_PortHistory = new ( ) ;
3108+ private ObservableCollection < int > _tigerVNC_PortHistory = [ ] ;
30883109
30893110 public ObservableCollection < int > TigerVNC_PortHistory
30903111 {
@@ -3163,7 +3184,7 @@ public int TigerVNC_Port
31633184
31643185 #region Web Console
31653186
3166- private ObservableCollection < string > _webConsole_UrlHistory = new ( ) ;
3187+ private ObservableCollection < string > _webConsole_UrlHistory = [ ] ;
31673188
31683189 public ObservableCollection < string > WebConsole_UrlHistory
31693190 {
@@ -3257,7 +3278,7 @@ public bool WebConsole_IsPasswordSaveEnabled
32573278
32583279 #region SNMP
32593280
3260- private ObservableCollection < string > _snmp_HostHistory = new ( ) ;
3281+ private ObservableCollection < string > _snmp_HostHistory = [ ] ;
32613282
32623283 public ObservableCollection < string > SNMP_HostHistory
32633284 {
@@ -3272,7 +3293,7 @@ public ObservableCollection<string> SNMP_HostHistory
32723293 }
32733294 }
32743295
3275- private ObservableCollection < string > _snmp_OidHistory = new ( ) ;
3296+ private ObservableCollection < string > _snmp_OidHistory = [ ] ;
32763297
32773298 public ObservableCollection < string > SNMP_OidHistory
32783299 {
@@ -3287,7 +3308,7 @@ public ObservableCollection<string> SNMP_OidHistory
32873308 }
32883309 }
32893310
3290- private ObservableCollection < SNMPOIDProfileInfo > _snmp_OidProfiles = new ( ) ;
3311+ private ObservableCollection < SNMPOIDProfileInfo > _snmp_OidProfiles = [ ] ;
32913312
32923313 public ObservableCollection < SNMPOIDProfileInfo > SNMP_OidProfiles
32933314 {
@@ -3681,7 +3702,7 @@ public int WakeOnLAN_Port
36813702 }
36823703 }
36833704
3684- private ObservableCollection < string > _wakeOnLan_MACAddressHistory = new ( ) ;
3705+ private ObservableCollection < string > _wakeOnLan_MACAddressHistory = [ ] ;
36853706
36863707 public ObservableCollection < string > WakeOnLan_MACAddressHistory
36873708 {
@@ -3696,7 +3717,7 @@ public ObservableCollection<string> WakeOnLan_MACAddressHistory
36963717 }
36973718 }
36983719
3699- private ObservableCollection < string > _wakeOnLan_BroadcastHistory = new ( ) ;
3720+ private ObservableCollection < string > _wakeOnLan_BroadcastHistory = [ ] ;
37003721
37013722 public ObservableCollection < string > WakeOnLan_BroadcastHistory
37023723 {
@@ -3745,7 +3766,7 @@ public double WakeOnLAN_ProfileWidth
37453766
37463767 #region Whois
37473768
3748- private ObservableCollection < string > _whois_DomainHistory = new ( ) ;
3769+ private ObservableCollection < string > _whois_DomainHistory = [ ] ;
37493770
37503771 public ObservableCollection < string > Whois_DomainHistory
37513772 {
@@ -3824,7 +3845,7 @@ public ExportFileType Whois_ExportFileType
38243845
38253846 #region IP Geolocation
38263847
3827- private ObservableCollection < string > _ipGeolocation_HostHistory = new ( ) ;
3848+ private ObservableCollection < string > _ipGeolocation_HostHistory = [ ] ;
38283849
38293850 public ObservableCollection < string > IPGeolocation_HostHistory
38303851 {
@@ -3905,7 +3926,7 @@ public ExportFileType IPGeolocation_ExportFileType
39053926
39063927 #region Calculator
39073928
3908- private ObservableCollection < string > _subnetCalculator_Calculator_SubnetHistory = new ( ) ;
3929+ private ObservableCollection < string > _subnetCalculator_Calculator_SubnetHistory = [ ] ;
39093930
39103931 public ObservableCollection < string > SubnetCalculator_Calculator_SubnetHistory
39113932 {
@@ -3924,7 +3945,7 @@ public ObservableCollection<string> SubnetCalculator_Calculator_SubnetHistory
39243945
39253946 #region Subnetting
39263947
3927- private ObservableCollection < string > _subnetCalculator_Subnetting_SubnetHistory = new ( ) ;
3948+ private ObservableCollection < string > _subnetCalculator_Subnetting_SubnetHistory = [ ] ;
39283949
39293950 public ObservableCollection < string > SubnetCalculator_Subnetting_SubnetHistory
39303951 {
@@ -3939,7 +3960,7 @@ public ObservableCollection<string> SubnetCalculator_Subnetting_SubnetHistory
39393960 }
39403961 }
39413962
3942- private ObservableCollection < string > _subnetCalculator_Subnetting_NewSubnetmaskHistory = new ( ) ;
3963+ private ObservableCollection < string > _subnetCalculator_Subnetting_NewSubnetmaskHistory = [ ] ;
39433964
39443965 public ObservableCollection < string > SubnetCalculator_Subnetting_NewSubnetmaskHistory
39453966 {
@@ -3989,7 +4010,7 @@ public ExportFileType SubnetCalculator_Subnetting_ExportFileType
39894010
39904011 #region WideSubnet
39914012
3992- private ObservableCollection < string > _subnetCalculator_WideSubnet_Subnet1 = new ( ) ;
4013+ private ObservableCollection < string > _subnetCalculator_WideSubnet_Subnet1 = [ ] ;
39934014
39944015 public ObservableCollection < string > SubnetCalculator_WideSubnet_Subnet1
39954016 {
@@ -4004,7 +4025,7 @@ public ObservableCollection<string> SubnetCalculator_WideSubnet_Subnet1
40044025 }
40054026 }
40064027
4007- private ObservableCollection < string > _subnetCalculator_WideSubnet_Subnet2 = new ( ) ;
4028+ private ObservableCollection < string > _subnetCalculator_WideSubnet_Subnet2 = [ ] ;
40084029
40094030 public ObservableCollection < string > SubnetCalculator_WideSubnet_Subnet2
40104031 {
@@ -4025,7 +4046,7 @@ public ObservableCollection<string> SubnetCalculator_WideSubnet_Subnet2
40254046
40264047 #region Bit Calculator
40274048
4028- private ObservableCollection < string > _bitCalculator_InputHistory = new ( ) ;
4049+ private ObservableCollection < string > _bitCalculator_InputHistory = [ ] ;
40294050
40304051 public ObservableCollection < string > BitCalculator_InputHistory
40314052 {
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