Method not found: 'nop.web.models.media.picturemodel nop.web.models.blogs.blogpostmodel.get_picture() in nopcommerce

See more:

C#

ASP.NET

MVC5

Nopcommerce

I have add a image field in blog. when i access blog list getting image successfully. But after some time it shows error.

Nop.Web.Models.Media.PictureModel Nop.Web.Models.Blogs.BlogPostModel.get_Picture()

My code is

int? productThumbPictureSize = null;
           int pictureSize = productThumbPictureSize.HasValue ? productThumbPictureSize.Value : _mediaSettings.ProductThumbPictureSize;

           if (blogPost.Picture != null)
           {
               var picture = _pictureService.GetPictureById(blogPost.Picture.Id);


               PictureModel pictureModel = new PictureModel();

               pictureModel.ImageUrl = _pictureService.GetPictureUrl(picture, pictureSize);
               pictureModel.FullSizeImageUrl = _pictureService.GetPictureUrl(picture);
               model.PictureModel = pictureModel;
           }

What I have tried:

I am trying to fetch image to show in blog list