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POCustomize .NET framework generated exception messages?
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copied!<p>I was wondering if there was a reasonable way to customize messages on exceptions that are thrown by the .NET framework? Below is a chunk of code that I write often, in many different scenarios to achieve the effect of providing reasonable exception messages to my users.</p> <pre><code>public string GetMetadata(string metaDataKey) { // As you can see, I am doing what the dictionary itself will normally do, but my exception message has some context, and is therefore more descriptive of the actual problem. if (!_Metadata.ContainsKey(metaDataKey)) { throw new KeyNotFoundException(string.Format("There is no metadata that contains the key '{0}'!", metaDataKey)); } // This will throw a 'KeyNotFoundException' in normal cases, which I want, but the message "The key is not present in the dictionary" is not very informative. This is the exception who's message I wish to alter. string val = _Metadata[metaDataKey].TrimEnd(); return val; } </code></pre> <p>As you can see, I am essentially producing duplicate code just to use a different (better) message. </p> <p><strong>Edit:</strong><br> What I am looking for, essentially is something like this:</p> <pre><code>KeyNotFoundException.SetMessage("this is my custom message!") { // OK, now this will send off the message I want when the exception appears! // Now I can avoid all of that silly boilerplate! string val = _Metadata[metaDataKey].TrimEnd(); } </code></pre> <p>At any rate, i don't think that such a feature exists, but if it did I would be very pleased indeed. Has anyone tackled this type of problem before? It's looking like I am going to wind up needed some type of extension method in the end...</p>

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