Lambdas

• Provide delegates, Expression<T> where T is not a delegate type
• Expression<T> where T is a delegate type.
• ability to produce an object model for an expression: Expression<Func<int, bool>> greaterThanZero = value => value > 0;
• Beneath the hood

ParameterExpression valueParam = Expression.Parameter(typeof(int), "value");
ConstantExpression constantZero = Expression.Constant(0);
BinaryExpression comparison = Expression.GreaterThan(valueParam, constantZero);
Expression<Func<int, bool>> greaterThanZero = Expression.Lambda<Func<int, bool>>(comparison, valueParam);  

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