complete login function and login window also add attached properties and helper classes for securestring

Server Dashboard/AttachedProperty/BaseAttachedProperty.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows;
+
+namespace Server_Dashboard {
+    public abstract class BaseAttachedProperty<Parent, Property>
+        where Parent : BaseAttachedProperty<Parent, Property>, new() {
+        public event Action<DependencyObject, DependencyPropertyChangedEventArgs> ValueChanged = (sender, e) => { };
+        public static Parent Instance { get; private set; } = new Parent();
+        public static readonly DependencyProperty ValueProperty = DependencyProperty.RegisterAttached("Value", typeof(Property), typeof(BaseAttachedProperty<Parent, Property>), new PropertyMetadata(new PropertyChangedCallback(OnValuePropertyChanged)));
+        private static void OnValuePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) {
+            Instance.OnValueChanged(d, e);
+            Instance.ValueChanged(d, e);
+        }
+        public static Property GetValue(DependencyObject d) => (Property)d.GetValue(ValueProperty);
+        public static void SetValue(DependencyObject d, Property value) => d.SetValue(ValueProperty, value);
+        public virtual void OnValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { }
+    }
+}

Server Dashboard/AttachedProperty/PasswordBoxProperties.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace Server_Dashboard {
+    public class MonitorPasswordProperty : BaseAttachedProperty<MonitorPasswordProperty, bool> {
+        public override void OnValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) {
+            var passwordBox = sender as PasswordBox;
+            if (passwordBox == null)
+                return;
+            passwordBox.PasswordChanged -= PasswordBox_PasswordChanged;
+
+            if ((bool)e.NewValue) {
+                HasTextProperty.SetValue(passwordBox);
+                passwordBox.PasswordChanged += PasswordBox_PasswordChanged;
+            }
+        }
+
+        private void PasswordBox_PasswordChanged(object sender, RoutedEventArgs e) {
+            HasTextProperty.SetValue((PasswordBox)sender);
+        }
+    }
+    public class HasTextProperty : BaseAttachedProperty<HasTextProperty, bool> {
+        public static void SetValue(DependencyObject sender) {
+            SetValue(sender, ((PasswordBox)sender).SecurePassword.Length < 1);
+        }
+    }
+}