http://davesbox.com/archive/tags/.NET+4.0/Linq/default.aspxTags: .NET 4.0, LinqenCommunityServer 2008 (Build: 30417.1769)http://davesbox.com/archive/2009/08/14/expressionvisitor-shipping-in-net-4-0.aspxFri, 14 Aug 2009 16:00:00 GMT2122c344-89bc-4cd7-b145-b0515ba3439f:4019David Kean0http://davesbox.com/rsscomments.aspx?PostID=4019http://davesbox.com/commentapi.aspx?PostID=4019http://davesbox.com/archive/2009/08/14/expressionvisitor-shipping-in-net-4-0.aspx#comments<p>As an update to <a href="http://davesbox.com/archive/2008/12/09/quot-i-can-t-believe-microsoft-didn-t-make-enter-api-name-here-public-quot.aspx">“I can’t believe Microsoft didn’t make [Enter API Name Here] public”</a>, the Visual Studio Languages team (which own the System.Linq namespace as well as the C#, VB and F# compilers) have added a new public version of <a href="http://davesbox.com/archive/2008/12/09/quot-i-can-t-believe-microsoft-didn-t-make-enter-api-name-here-public-quot.aspx">ExpressionVisitor</a>. </p> <p>This type allows you to traverse an entire expression graph by simply passing the expression to <strong>ExpressionVisitor.Visit(Expression)</strong>. Each expression type has an associated <strong>VisitXXX</strong> method (such as <strong>VisitMember(MemberExpression),</strong> <strong>VisitCatchBlock(CatchBlock)</strong>, etc) that you can override to get called back every time one of these expressions is encountered.</p> <p>This should make <a href="http://codebetter.com/blogs/jeremy.miller/archive/2008/12/04/i-love-ayende-and-oss.aspx">Jeremy</a> and <a href="http://ayende.com/">Oren</a> very happy. ;)</p><div style="clear:both;"></div><img src="http://davesbox.com/aggbug.aspx?PostID=4019" width="1" height="1">.NET 4.0Linq