C # Add a watermark to the image (transparency can be set)

/// <Summary>

• /// Creating a Watermarked Photograph with GDI + for. NET
• /// </Summary>
• /// <Param name = "rSrcImgPath"> physical path of the original image </param>
• /// <Param name = "rMarkImgPath"> physical path of the watermark image </param>
• /// <Param name = "rMarkText"> watermark text (do not show the watermark text as a blank string) </param>
• /// <Param name = "rDstImgPath"> output the physical path of the merged image. </param>
• // @ Finishing: anyrock@mending.cn
• Public void BuildWaterma