I thought some of you folks might find this useful. I know everyone loves using the static factory methods on Expression to create expression trees programatically. And, of course, we know expressions are immutable, which prevents us from writing a template tree from which we can make changes and rip copies. To help with problems in this class, I wrote something I am calling "MetaLinq", which includes two cool features: A set of classes (EditableExpression and it's children) for creating
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