public ref class Form1 : public System::Windows::Forms::Form
{
    cli::array<float, 1>^ m_dataArray;

    Form1(void):
        m_dataArray(gcnew cli::array<float, 1>(256))
    {
        InitializeComponent();
        ConfigureGraph(m_spectraGraph1);
    }

    // Windows forms generated code (cut down for brevity)
    void InitializeComponent(void)
    {
        chartArea1->Name = L"ChartArea1";
        this->m_spectraGraph1->ChartAreas->Add(chartArea1);
        this->m_spectraGraph1->Dock = System::Windows::Forms::DockStyle::Fill;
        legend1->Name = L"Legend1";
        this->m_spectraGraph1->Legends->Add(legend1);
        this->m_spectraGraph1->Location = System::Drawing::Point(3, 3);
        this->m_spectraGraph1->Name = L"m_spectraGraph1";
        series1->ChartArea = L"ChartArea1";
        series1->ChartType = System::Windows::Forms::DataVisualization::Charting::SeriesChartType::FastLine;
        series1->Legend = L"Legend1";
        series1->Name = L"Series1";
        this->m_spectraGraph1->Series->Add(series1);
        this->m_spectraGraph1->Size = System::Drawing::Size(331, 253);
        this->m_spectraGraph1->TabIndex = 0;
        this->m_spectraGraph1->Text = L"chart1";
    }

    void ConfigureGraph(System::Windows::Forms::DataVisualization::Charting::Chart^% chart1)
    {
        chart1->DataSource = m_dataArray;
        chart1->Legends->Clear();
    }

    void UpdateChart()
    {
       Random r(DateTime::Now.Millisecond);
       int count = m_dataArray->Length;
       for(int i = 0; i < count; ++i)
       {
           m_dataArray[i] = r.Next(90,110)/100.0f;
       }
       m_spectraGraph1->DataBind();
    }
};