Add project files.

Nodify/Connections/Events/ConnectionEventArgs.cs

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+using System;
+using System.Windows;
+
+namespace Nodify.Events
+{
+    /// <summary>
+    /// Represents the method that will handle <see cref="BaseConnection"/> related routed events.
+    /// </summary>
+    /// <param name="sender">The object where the event handler is attached.</param>
+    /// <param name="e">The event data.</param>
+    public delegate void ConnectionEventHandler(object sender, ConnectionEventArgs e);
+
+    /// <summary>
+    /// Provides data for <see cref="BaseConnection"/> related routed events.
+    /// </summary>
+    public class ConnectionEventArgs : RoutedEventArgs
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ConnectionEventArgs"/> class using the specified <see cref="Connection"/>.
+        /// </summary>
+        /// <param name="connection">The <see cref="FrameworkElement.DataContext"/> of a related <see cref="BaseConnection"/>.</param>
+        public ConnectionEventArgs(object connection)
+            => Connection = connection;
+
+        /// <summary>
+        /// Gets or sets the location where the connection should be split.
+        /// </summary>
+        public Point SplitLocation { get; set; }
+
+        /// <summary>
+        /// Gets the <see cref="FrameworkElement.DataContext"/> of the <see cref="BaseConnection"/> associated with this event.
+        /// </summary>
+        public object Connection { get; }
+
+        protected override void InvokeEventHandler(Delegate genericHandler, object genericTarget)
+            => ((ConnectionEventHandler)genericHandler)(genericTarget, this);
+    }
+}