private void InsertSnippet_Click(object sender, EventArgs e) { ToolStripMenuItem item = sender as ToolStripMenuItem; if (item == null) { return; } ScintillaEditForm document = _mainForm.ActiveDocument as ScintillaEditForm; if (document == null) { return; } string snippet = FileTools.ReadFile(item.Name); if (String.IsNullOrEmpty(snippet)) { return; } document.InsertSnippet(snippet); }