public sealed class ImageMosaicSubLayer : ImageServiceLayer, ArcGIS.Desktop.Core.IMetadataInfo, IMetadataSource, ITableDefinitionQueries, System.ComponentModel.INotifyPropertyChanged  

await QueuedTask.Run(() =>
{
  // Get the image sub-layer from the mosaic layer.
  ImageMosaicSubLayer mosaicImageSubLayer = mosaicLayer.GetImageLayer();
  // Get the colorizer from the image sub-layer.
  CIMRasterColorizer rasterColorizer = mosaicImageSubLayer.GetColorizer();
  // Update raster colorizer properties.
  rasterColorizer.Brightness = 10;
  rasterColorizer.Contrast = -5;
  rasterColorizer.ResamplingType = RasterResamplingType.NearestNeighbor;
  // Update the image sub-layer with the changed colorizer.
  mosaicImageSubLayer.SetColorizer(rasterColorizer);
});

await QueuedTask.Run(() =>
{
  // Get the image sub-layer from the mosaic layer.
  ImageMosaicSubLayer mosaicImageSubLayer = mosaicLayer.GetImageLayer();
  // Get the colorizer from the image sub-layer.
  CIMRasterColorizer rColorizer = mosaicImageSubLayer.GetColorizer();
  // Check if the colorizer is an RGB colorizer.
  if (rColorizer is CIMRasterRGBColorizer rasterRGBColorizer)
  {
    // Update RGB colorizer properties.
    rasterRGBColorizer.StretchType = RasterStretchType.ESRI;
    // Update the image sub-layer with the changed colorizer.
    mosaicImageSubLayer.SetColorizer(rasterRGBColorizer);
  }
});

await QueuedTask.Run(() =>
{
  // Get the image sub-layer from the mosaic layer.
  ImageMosaicSubLayer mosaicImageSubLayer = mosaicLayer.GetImageLayer();
  // Get the list of colorizers that can be applied to the image sub-layer.
  IEnumerable<RasterColorizerType> applicableColorizerList =
    mosaicImageSubLayer.GetApplicableColorizers();
  // Check if the RGB colorizer is part of the list.
  bool isTrue_ContainTheColorizerType =
    applicableColorizerList.Contains(RasterColorizerType.RGBColorizer);
});

await QueuedTask.Run(async () =>
{
  // Get the image sub-layer from the mosaic layer.
  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);
  }
});

await QueuedTask.Run(async () =>
{
  // Get the image sub-layer from the mosaic layer.
  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 specifying parameters
    // for band index, stretch type, gamma and color ramp.
    StretchColorizerDefinition stretchColorizerDef_custom =
      new StretchColorizerDefinition(1, RasterStretchType.ESRI, 2, colorRamp);
    // Create a new stretch colorizer using the colorizer definition created above.
    CIMRasterStretchColorizer newStretchColorizer_custom =
      await mosaicImageSubLayer.CreateColorizerAsync(stretchColorizerDef_custom) as CIMRasterStretchColorizer;
    // Set the new colorizer on the image sub-layer.
    mosaicImageSubLayer.SetColorizer(newStretchColorizer_custom);
  }
});