How to turn off comments for all blog posts for a specific blog?
How to disable comments for all blog posts for a specific blog?

This feature is not available out of the box in Sitefinity. However, we can turn off comments for the all blog posts in a specific blog by setting the ' AllowComments' property to 'false'. Please refer to the following code -
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using System;
using System.Linq;
using Telerik.Sitefinity.Blogs.Model;
using Telerik.Sitefinity.GenericContent.Model;
using Telerik.Sitefinity.Modules.Blogs;

namespace SitefinityWebApp
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
DisableCommentsForBlog("Hen");
}

private void DisableCommentsForBlog(string blogTitle)
{
BlogsManager blogsManager = BlogsManager.GetManager();

var blogPosts = blogsManager.GetBlogPosts().Where(b => b.Parent.Title == blogTitle && b.Status == ContentLifecycleStatus.Live).ToList();

foreach (var blogPost in blogPosts)
{
var master = blogsManager.Lifecycle.GetMaster(blogPost);

if (master != null)
{
//Check out the master to get a temp version.
BlogPost temp = blogsManager.Lifecycle.CheckOut(master) as BlogPost;

temp.AllowComments = false;

//Checkin the temp and get the updated master version.
//After the check in the temp version is deleted.
master = blogsManager.Lifecycle.CheckIn(temp) as BlogPost;

blogsManager.Lifecycle.Publish(master);

blogsManager.SaveChanges();
}
}
}
}
}
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