ラスター レイヤーでストレッチ分類の凡例を設定する方法

private void testToolStripMenuItem_Click(object sender, EventArgs e)
{
    IRasterLayer pRasterLayer = (IRasterLayer)axMapControl1.get_Layer(0);

    IRasterStretchColorRampRenderer pRasterStretchColorRampRenderer = (IRasterStorRampRenderer)pRasterLayer.Renderer;
    IRasterStretch2 pRasterStretch = (IRasterStretch2)pRasterStretchColorRampRenderer;
    IRasterStretchMinMax pRasterStretchMinMax = (IRasterStretchMinMax)pRasterStrrRampRenderer;
    pRasterStretch.StretchStatsType = esriRasterStretchStatsTypeEnum.esriRasterSats_Dataset
    pRasterStretch.StretchType = esriRasterStretchTypesEnum.esriRasterStretch_Stviations;   //標準偏差

    pRasterStretchColorRampRenderer.LabelHigh = "高 : " + pRasterStretchMinMax.Sx.ToString();
    pRasterStretchColorRampRenderer.LabelLow = "低 : " + pRasterStretchMinMax.St.ToString();

    axMapControl1.Refresh();
}