Initial commit of existing code.

* All renderdoc code up to this point was written by me, history is available by request

WinFormsUI/Docking/DockContentEventArgs.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace WeifenLuo.WinFormsUI.Docking
+{
+    public class DockContentEventArgs : EventArgs
+    {
+        private IDockContent m_content;
+
+        public DockContentEventArgs(IDockContent content)
+        {
+            m_content = content;
+        }
+
+        public IDockContent Content
+        {
+            get    {    return m_content;    }
+        }
+    }
+}