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copied!<p>It means that you're casting (which can be costly) the <code>customField</code> variable multiple times, and that you'd be better of by casting only once.</p> <p>You can use the <a href="http://msdn.microsoft.com/en-us/library/cscsdfbt%28v=vs.71%29.aspx" rel="nofollow"><code>as</code></a> operator to achieve that, since the <code>as</code> operator performs the cast and returns an instance of the desired type, or NULL if the object could not be casted to the desired type.</p> <p>Like this:</p> <pre><code>DateCustomFieldRef customField = customFields[f] as DateCustomFieldRef; // the as operator returns null if the casting did not succeed (that is, customFields[f] is not a DatecustomFieldRef instance if (customField != null) { DateCustomFieldRef dateField = customField; if (dateField.internalId != null && dateField.internalId == "created_date") { createdDate = dateField.value.ToString(); } } else { var stringField = customFields[f] as StringCustomFieldRef; if (stringField != null ) { StringCustomFieldRef tradingNameField = stringField; if (businessNameField.internalId != null && businessNameField.internalId == "business_name") { businessName = businessNameField.value; } } } </code></pre> <p>But, I believe that there probably exists an even better solution (although I do not know your project, nor your code), but wouldn't it be possible to abstract some things away ?</p> <p>Perhaps you have a <code>CustomField</code> baseclass, and <code>DateCustomFieldRef</code> and <code>StringCustomFieldRef</code> inherit from that <code>Customfield</code> base-class. If that's the case, you could create a virtual (or maybe even abstract) method in the <code>CustomField</code> base-class, which is overriden in each child-class, which actually returns the value of that field.</p> <p>Like this:</p> <pre><code>public class CustomField<T> { public string Internalid { get; set; } public T Value { get; set; } public virtual string GetStringRepresentation() { return Value.ToString(); } } public class DateCustomField : CustomField<DateTime> { public override string GetStringRepresentation() { return Value.ToShortDateString(); } } </code></pre> <p>Your code can then look much more simple:</p> <pre><code>foreach( CustomField f in customFields ) { if( f.InternalId == "created_date" ) { createdDate = f.GetStringRepresentation(); } if( f.InternalId == "business_name" ) { businessName = f.GetStringRepresentation(); } } </code></pre> <p>(The code above could be made more simple and clean, but you'll get the drift.)</p>

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