string AddDashboard(
    XDocument dashboard,
    string dashboardName
)

Function AddDashboard(
    dashboard As XDocument,
    dashboardName As String
) As String

public string AddDashboard(XDocument document, string dashboardName) {
    using (SqlConnection connection = new SqlConnection(connectionString)) {
        connection.Open();
        MemoryStream stream = new MemoryStream();
        document.Save(stream);
        stream.Position = 0;

        SqlCommand InsertCommand = new SqlCommand(
            "INSERT INTO Dashboards (Dashboard, Caption) " +
            "output INSERTED.ID " +
            "VALUES (@Dashboard, @Caption)");
        InsertCommand.Parameters.Add("Caption", SqlDbType.NVarChar).Value = dashboardName;
        InsertCommand.Parameters.Add("Dashboard", SqlDbType.VarBinary).Value = stream.ToArray();
        InsertCommand.Connection = connection;
        string ID = InsertCommand.ExecuteScalar().ToString();
        connection.Close();
        return ID;
    }
}