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copied!<p>Short answer: No, there isn't. (Is that terse enough? ;)</p> <p>(EDIT: Justin's answer probably counts. It leaves a bad taste in my mouth, but it accomplishes the goal of "no need to put the parameter name into a string". I don't think I'd really count AOP though, as that's really changing to a completely different approach rather than answering the original question of getting a parameter name from within a method.)</p> <p>Longer answer: There's a way to find out <em>all the parameters</em> of a method, but I don't think it's useful in this case.</p> <p>Here's an example which displays the parameter names from a couple of methods:</p> <pre><code>using System; using System.Reflection; class Test { static void Main() { Foo(null); Bar(null); } static void Foo(object resource) { PrintParameters(MethodBase.GetCurrentMethod()); } static void Bar(object other) { PrintParameters(MethodBase.GetCurrentMethod()); } static void PrintParameters(MethodBase method) { Console.WriteLine("{0}:", method.Name); foreach (ParameterInfo parameter in method.GetParameters()) { Console.WriteLine(" {0} {1}", parameter.ParameterType, parameter.Name); } } } </code></pre> <p>So that does that, but if you have multiple parameters and you wanted to throw an appropriate exception, how would you know (in a safe way) which to use? Ideally you want something like:</p> <pre><code>public void Woof(object resource) { if (resource == null) { throw new ArgumentNullException(infoof(resource)); } // .. } </code></pre> <p>where the mythical <code>infoof</code> operator would return a <code>ParameterInfo</code>. Unfortunately this doesn't exist.</p>

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