I have needed in several occasions some classes to represent and manipulate conditions (typically in a UI so the user builds a query by combining different condition types and then the code can tra...

Is it possible to find out if two expressions are the same? Like given the following four expressions: Expression<Func<int, bool>> a = x => false; Expression<Func<in...

Im having problems building a query with the linq to sql data query expression in c#. What I'm trying to ultimately do is based on this pseudo-code expression. public IQueryable<CTest> sear...

There are 4 overloaded signatures for Enumerable.SelectMany. To make it simple, we ignore the two signatures with int argument. So we have 2 signatures for SelectMany: public static IEnumerable&lt...

I have an expression tree I have created by parsing an Xml using the expression class in C#. See this question. I only have Add, Subtract, Divide, Multiply, Parameters, And and Or in my Expression...

When an Expression<T> is compiled, is the resultant code implicitly cached by the framework? I'm thinking along the lines of the static Regex methods where the framework implicitly compiles a...

What is the purpose of this UnaryExpression, and how should it be used?

What is the difference between anonymous methods of C# 2.0 and lambda expressions of C# 3.0.?

I completely understand the concept of expression trees, but I am having a hard time trying to find situations in which they are useful. Is there a specific instance in which expression trees can b...