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copied!<p>You can check if an object has a public settable property with a certain name using this code:</p> <pre><code>public static bool HasWritableProperty(this object objectToCheck, string propertyName) { var type = objectToCheck.GetType(); //get a property info for the property, but only if it is a public instance property var pi = type.GetProperty(propertyName, BindingFlags.Instance | BindingFlags.Public) //return false if no propery is found if (pi==null) return false; //get the set method for the property var setter = pi.GetSetMethod(); //if it's null the property is not writable return (setter != null); } </code></pre> <p>However, this is not a very efficient code, as it uses a lot of reflection.</p> <p>If you go this route, I would memoize the result of this code, so every check will be run at most once.</p> <p>What I actually do in my projects (I use EF Code First), is have a <code>BaseEntity</code> class that has the properties that are common, and have the concrete entities inherit from the <code>BaseEntity</code> class. Then I have a <code>FillEntityMetadata</code> method, that is more or less this:</p> <pre><code>protected void FillEntityMetadata(BaseEntity entity, bool isUpdate = false) { // Set audit data. if (!isUpdate) { entity.CreatedBy = CurrentUser.ID; entity.CreatedOn = DateTime.Now; entity.IsActive = true; } entity.LastModifiedBy = CurrentUser.ID; entity.LastModifiedOn = DateTime.Now; } </code></pre> <p>Note that for this to work, you can also use an interface, <code>IBaseEntity</code>, and it would function in the same way.</p>

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