string BrowseForSchema()
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();

            openFileDialog.Filter = StringParser.Parse("${res:SharpDevelop.FileFilter.XmlSchemaFiles}|*.xsd|${res:SharpDevelop.FileFilter.AllFiles}|*.*");

            if (schemasPanel.ShowDialog(openFileDialog) == true)
            {
                return(openFileDialog.FileName);
            }
            return(null);
        }