Clip raster image by a boundary (polyline) Autocad .net C#

[Anonymous]

Hi, 

I need to clip a raster image using a rectangle (boundary) the function must be in the following form, and the steps I need are in comments 

public static void ClippingRasterBoundary()
        {
            // Select a closed polyline that defines the clip boundary
        
            //get the object Id of the entity

            //open the selected entity
            

            // Select a raster image

            //get the object Id of the entity

            //open the selected entity

           
            // Set the clip boundary of the raster image

            
        }

[Anonymous]

PNG Image.