Use (certain) lambda expressions when targeting .NET 2.0?

Question

Hi,

ReSharper suggests we change:

System.Net.ServicePointManager.ServerCertificateValidationCallback +=
    delegate(object sender, X509Certificate certificate, X509Chain chain,
        SslPolicyErrors sslPolicyErrors)
{
    return true;
};

Into:

System.Net.ServicePointManager.ServerCertificateValidationCallback +=
    (sender, certificate, chain, sslPolicyErrors) => true;

It looks a bit cleaner. But we are targeting .NET 2.0. Is this still something we should do?

Answer 1

You can use it as long as you use VS2008 (or later) for development. Lambda expressions is a feature of C# language, it's not a feature of .Net Framework.

Answer 2

You should choose which of them you preferre the most. In c# 3.0 all features introduced (such as Lambda expression, enxtension methods and LINQ) are build on the 2.0 .NET runtime. So you can develop using C#3.0 and run it on the 2.0 of the runtime.

As long as your compiler can handle C#3.0 you can use all the new C#3.0 features. The only exception I know of is that if you use Expression trees you'd need to use .NET 2.0 SP1 because some of the bug fixes in the CLR for that service pack is needed to make expression trees work propperly.