Quick Tool to update the postName for each entry in my converted BlogML Blogger export file

gistfile1.cs

var inputFile = @"whatever.xml";
var outputFile = @"whatever.updated.xml";
BlogMLBlog blog;	
			
using (var reader = new StreamReader(inputFile))
	blog = BlogMLSerializer.Deserialize(reader);
	
var usedNames = new List<string>();
foreach(var post in blog.Posts.OrderBy(p => p.DateCreated))
{
	var newName = Regex.Replace(post.Title.ToLower().Replace("'", "").Replace("c#", "c-sharp").Replace("f#", "f-sharp").Replace(" .net", "-dot-net"), @"[^a-z0-9]+", "-").TrimStart('-').TrimEnd('-');
	if(String.IsNullOrEmpty(newName))
		newName = "unknown-post";
	int i = 2;
	while(usedNames.Contains(newName))
	{
		newName = newName + "-" + i++;
	}
	usedNames.Add(newName);
	post.PostName = newName;
}

using(var writer = new StreamWriter(outputFile))
	BlogMLSerializer.Serialize(writer, blog);