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copied!<p>If you need it i created a small fluent library to create lambda functions on the fly without directly coping with System.Linq.Expressions. And it can easily handle the kind of situation. Just to give an example:</p> <pre><code>static void Main(string[] args) { var firstNameCompare = ExpressionUtil.GetComparer<FullName>((a) => a.FirstName); var lastNameCompare = ExpressionUtil.GetComparer<FullName>((a) => a.LastName); Func<FullName, bool> combined = (a) => firstNameCompare(a, "Dog") && lastNameCompare(a, "Boy"); var toCheck = new FullName {FirstName = "Dog", LastName = "Boy"}; Console.WriteLine("Dog Boy should be true: {0}", combined(toCheck)); toCheck = new FullName {FirstName = "Cat", LastName = "Boy"}; Console.WriteLine("Cat Boy should be false: {0}", combined(toCheck)); Console.ReadLine(); } </code></pre> <p>The GetComparer methods seek for the property passed as expression and find ho to get its value, then it builds a new Expression that will handle the comparaison.</p> <p>At the end the two functions are evaluated calling the "combined" function.</p> <p>If you need more verifications you could use an array and iterate on it inside the "combined lambda"</p> <p>The code and documentation for the library are here: <a href="http://kendar.org/?p=/dotnet/expressionsbuilder" rel="nofollow">Kendar Expression Builder</a> While the nuget package is here: <a href="https://www.nuget.org/packages/ExpressionBuilder/" rel="nofollow">Nuget Expression Builder</a></p>

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