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POClass creation memory load / anonymous classes
 

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    <p>Working in an application and there's the following extension method listed for Exceptions:</p> <pre><code>public static void FillData(this Exception target, object data) { if (target == null) throw new ArgumentNullException("target"); if (data == null) throw new ArgumentNullException("data"); string stackTraceSite = target.LastStackTraceSite(); var stringDict = new System.Collections.Specialized.StringDictionary(); PropertyInfo[] pis = data.GetType().GetProperties(); int pisLen = pis.Length; for (int i = 0; i &lt; pisLen; i++) { string key = (stackTraceSite != null ? stackTraceSite + '.' : null) + pis[i].Name; try { target.Data[key] = pis[i].GetValue(data, null) ?? "null"; } catch (ArgumentException ae) { target.Data[key] = "ARGUMENT EXCEPTION -&gt; " + ae.Message; } } } </code></pre> <p>This is then called or used in a similar fashion:</p> <pre><code>try { // Perform some dangerous operation that throws an exception } catch (Exception ex) { ex.FillData(new { CustId = 4, Category = "Foo", Style = "bar" }); Logger.LogError(ex); } </code></pre> <p>The members of the anonymous type (as in the example) are "reused" in some cases, but in many other cases they are quite different. (e.g. <code>new { FileType = Enum.FileType.RejectionLetter, FilePath = loadFilePath }</code>)</p> <p>This sort of code is used in quite a few locations and in a web app that's going to get a lot of traffic.. one question I'm wondering is: will the definition of all those anonymous classes eventually bog down / crash / create a significant memory load even if / when they aren't being caught?</p>
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    1. USRostov
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    1. COAre these properties static (that is, the anonymous types _all_ use some combination of `CustId`, `Category`, and `Style`) or is this just a lazy way to define arbitrary key/value pairs for each exception handler? EDIT: Also, I doubt _this_ would be the cause of your website bogdown/crash/significant memory load. These are happening in _exceptional_ cases. Do you expect your users to be causing these exceptions to be thrown left-right-and-centre?
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      1. USChris Sinclair
    2. COEdited for clarification.. not the anonymous types use a numerous combination of things.. I have no idea how many. They appear to have reused them where possible (and thus re-using the anonymous class signature) but in other cases they're totally separate. I wouldn't think the exceptions would be thrown like crazy, but as I'm a contractor and at the moment quite know that answer. I wouldn't think that even ... 1000 extra class definitions would matter, but I was just curious.
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