public StretchColorizerDefinition()

{
    // Check if the Stretch colorizer can be applied to the raster layer.
    //Note: needs to be called on the QueuedTask
    if (rasterLayer.GetApplicableColorizers().Contains(RasterColorizerType.StretchColorizer))
    {
        // Create a new Stretch Colorizer Definition using the default constructor.
        StretchColorizerDefinition stretchColorizerDef_default = new StretchColorizerDefinition();
        // Create a new Stretch colorizer using the colorizer definition created above.
        CIMRasterStretchColorizer newStretchColorizer_default =
        await rasterLayer.CreateColorizerAsync(stretchColorizerDef_default) as CIMRasterStretchColorizer;
        // Set the new colorizer on the raster layer.
        rasterLayer.SetColorizer(newStretchColorizer_default);
    }
}

{
    // Create a new stretch colorizer definition using default constructor.
    StretchColorizerDefinition stretchColorizerDef = new StretchColorizerDefinition();
    // Create a raster layer creation parameters object with the raster file path.
    var rasterLayerCreationParams = new RasterLayerCreationParams(new Uri("rasterPath"))
    {
        ColorizerDefinition = stretchColorizerDef,
        Name = "rasterLayerName",
        MapMemberIndex = 0
    };

    // Create a raster layer using the colorizer definition created above.
    // Note: You can create a raster layer from a url, project item, or data connection.
    //Note: Run within a QueuedTask
    RasterLayer rasterLayerfromURL =
  LayerFactory.Instance.CreateLayer<RasterLayer>(rasterLayerCreationParams, map);

}

{
    // Get the image sub-layer from the mosaic layer.
    //Note: needs to be called on the QueuedTask
    ImageMosaicSubLayer mosaicImageSubLayer = mosaicLayer.GetImageLayer();
    // Check if the Stretch colorizer can be applied to the image sub-layer.
    if (mosaicImageSubLayer.GetApplicableColorizers().Contains(RasterColorizerType.StretchColorizer))
    {
        // Create a new Stretch Colorizer Definition using the default constructor.
        StretchColorizerDefinition stretchColorizerDef_default = new StretchColorizerDefinition();
        // Create a new Stretch colorizer using the colorizer definition created above.
        CIMRasterStretchColorizer newStretchColorizer_default =
    await mosaicImageSubLayer.CreateColorizerAsync(stretchColorizerDef_default) as CIMRasterStretchColorizer;
        // Set the new colorizer on the image sub-layer.
        mosaicImageSubLayer.SetColorizer(newStretchColorizer_default);
    }
}

// Create a new colorizer definition using default constructor.
{
    StretchColorizerDefinition stretchColorizerDef = new StretchColorizerDefinition();
    var rasterLayerCreationParams = new RasterLayerCreationParams(new Uri("url"))
    {
        Name = "layerRasterName",
        ColorizerDefinition = stretchColorizerDef,
        MapMemberIndex = 0

    };
    // Create a mosaic layer using the colorizer definition created above.
    // Note: You can create a mosaic layer from a url, project item, or data connection.
    //Note: Run within a QueuedTask
    MosaicLayer newMosaicLayer = LayerFactory.Instance.CreateLayer<MosaicLayer>(rasterLayerCreationParams, map);
}

{
    // Check if the Stretch colorizer can be applied to the image service layer.
    if (imageServiceLayer.GetApplicableColorizers().Contains(RasterColorizerType.StretchColorizer))
    {
        // Create a new Stretch Colorizer Definition using the default constructor.
        StretchColorizerDefinition stretchColorizerDef_default = new StretchColorizerDefinition();
        // Create a new Stretch colorizer using the colorizer definition created above.
        CIMRasterStretchColorizer newStretchColorizer_default =
    await imageServiceLayer.CreateColorizerAsync(stretchColorizerDef_default) as CIMRasterStretchColorizer;
        // Set the new colorizer on the image service layer.
        imageServiceLayer.SetColorizer(newStretchColorizer_default);
    }
}

{
    // Create a new colorizer definition using default constructor.
    StretchColorizerDefinition stretchColorizerDef = new StretchColorizerDefinition();
    var rasterLayerCreationParams = new RasterLayerCreationParams(new Uri(url))
    {
        Name = "RasterLayer",
        ColorizerDefinition = stretchColorizerDef,
        MapMemberIndex = 0
    };
    // Create an image service layer using the colorizer definition created above.
    //Note: Run within a QueuedTask
    ImageServiceLayer imageServiceLayerWithColorizer =
  LayerFactory.Instance.CreateLayer<ImageServiceLayer>(rasterLayerCreationParams, map);
}