http://msmvps.com/blogs/bill/archive/2007/05/12/anonymous-method-remain-mutable-in-vb.aspxPaul Vick posted that anonymous types will remain mutable in VB . Generally this looks good, I just hope that it is not a requirement to specify the key. That is if no key is specified, then the hashcode will be generated will be created based on allenCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/bill/archive/2007/05/12/anonymous-method-remain-mutable-in-vb.aspx#1012409Mon, 09 Jul 2007 19:05:45 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1012409@ Head<p>Previously I wrote about my opinion on anonymous types and keys. This post just tells it how it actually</p> <img src="http://msmvps.com/aggbug.aspx?PostID=1012409" width="1" height="1">http://msmvps.com/blogs/bill/archive/2007/05/12/anonymous-method-remain-mutable-in-vb.aspx#933318Wed, 30 May 2007 04:44:47 GMTd67277c4-116b-43f1-b688-e9ef184ea916:933318Tim<p>Hey Bill; actually for queries, we surface the anonymous types as immutable by default. There currently is no way to surface mutable anonymous types in a query projection.</p> <p>dim q = from c in Countries select c.Country, c.State</p> <p>surfaces a collection of immutable anonymous types.</p> <p>Your proposed syntax is interesting though.</p> <div style="clear:both;"></div><img src="http://msmvps.com/aggbug.aspx?PostID=933318" width="1" height="1">