Layout Null in .cshtml

private PagedQueryResult MapBlogPosts(PagedQueryResult customEntityResult)

{

var blogPost = new BlogPostSummary();

var blogPosts = new List(customEntityResult.Items.Count());

var Categoryid = Convert.ToInt32(HttpContext.Request.Cookies["CategoryId"]);

//var data = customEntityResult.Items.ToList();

var result = customEntityResult.Items.Select(x => (BlogPostDataModel)x.Model).Where(x => x.CategoryIds.Contains(Convert.ToInt32(Categoryid))).ToList();

int i = 0;

foreach (var customEntitys in result)

{

if (customEntitys.CategoryIds.Any(x => x == Categoryid))

{

blogPost.ShortDescription = customEntitys.ShortDescription;

blogPost.TestHtml = Regex.Replace(customEntitys.TestHtml ?? "", "<.*?>|&.*?;", "");

blogPosts.Add(blogPost);

i++;

}

}