first commit

ICSharpCode.TextEditor/Project/Src/Actions/GoToLineNumberAction.cs

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+using System.Windows.Forms;
+using ICSharpCode.TextEditor.Actions;
+using ICSharpCode.TextEditor.UserControls;
+
+namespace ICSharpCode.TextEditor.Src.Actions
+{
+    class GoToLineNumberAction : AbstractEditAction
+    {
+        private readonly GotoForm _gotoForm;
+
+        public GoToLineNumberAction()
+        {
+            _gotoForm = new GotoForm();
+        }
+
+        public override void Execute(TextArea textArea)
+        {
+            _gotoForm.FirstLineNumber = 1;
+            _gotoForm.LastLineNumber = textArea.Document.TotalNumberOfLines;
+            _gotoForm.SelectedLineNumber = textArea.Caret.Line + 1;
+
+            if (DialogResult.OK == _gotoForm.ShowDialogEx() && _gotoForm.SelectedLineNumber > 0)
+            {
+                textArea.Caret.Position = new TextLocation(0, _gotoForm.SelectedLineNumber - 1);
+            }
+        }
+    }
+}