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    <p>I'm assuming that caseConductor.SomeCleverFunction is not a static method, and has access to the Person object, and that the Person object itself if a public property.</p> <p>I'm also assuming that you want to pass a string like "prop.address.street" where each sub property is an class that containts a puplic property with that name</p> <ol> <li>Split the string input on the period, find the left most string</li> <li>Use reflection to get a list of properties ( typeof(caseconductor).GetProperties() )</li> <li>Find the matching property, call GetValue on it, passing the last known solid object (starting with 'this') and storing a refernce to it.</li> <li>if there is more sub properties in the string left, repeat to step 1, removing the left most part of the string.</li> <li>otherwise, call GetValue() on the property, using the last GetValue() return object from step 3, and return it.</li> </ol> <p>Something like:</p> <p>"prop.address.street" -> find property "prop" from 'this' and GetValue, </p> <p>there is still more "."'s so repeat, storing return value</p> <p>"address.street" -> find property "address" from the last returned GetValue, and get it's value.</p> <p>there is still more "."'s so repeat, storing return value</p> <p>"street" -> find property "street" from the last returned GetValue, and return it's value.</p> <p>End of string, return last value</p> <p>Edit - </p> <p>This is pretty rough, but toss it into LinqPAD and take a look.</p> <p><a href="http://www.linqpad.net/" rel="nofollow noreferrer">http://www.linqpad.net/</a></p> <p>Edit #2 - you should be able to index into arrays using the ^ syntax below.</p> <p>Again this is reaaaaaaaaally rough, just enough to get a working example.</p> <p>Edit #3 - Cleaned up the example slightly and changed it from my example classes to yours.</p> <pre><code>void Main() { //- Load a caseConductor var caseConductor = new CaseConductor(); caseConductor.CaseID = "A00001"; // person caseConductor.Person = new Person(); caseConductor.Person.Surname = "Smith" ; caseConductor.Person.DOB = DateTime.Now ; // case note list caseConductor.CaseNoteList = new List&lt;Note&gt;(); caseConductor.CaseNoteList.Add(new Note { NoteText = "A-1" , NoteDt = DateTime.Now }); caseConductor.CaseNoteList.Add(new Note { NoteText = "B-2", NoteDt = DateTime.Now }); // I could do this ... string val1 = caseConductor.GetPropertyValue&lt;string&gt;("Person.Surname"); // or this ... Note val2 = caseConductor.GetPropertyValue&lt;Note&gt;("CaseNoteList^1"); val1.Dump("val1"); //this is a string val2.Dump("val2"); //this is a Note } public static class extensions { public static T GetPropertyValue&lt;T&gt;(this object o,string Properties) where T:class { var properties = Properties.Split('.'); var indexsplit = properties[0].Split('^'); var current = indexsplit[0]; var prop = (from p in o.GetType().GetProperties() where p.Name == current select p).Take(1).Single(); var val = prop.GetValue(o,null); if(indexsplit.Length&gt;1) { var index = int.Parse(indexsplit[1]); IList ival = (IList)val; val = ival[index]; } if(properties[0] == Properties) return (T)val; else return val.GetPropertyValue&lt;T&gt;(Properties.Replace(properties[0]+".","")); } } class Note { public Guid NoteID { get; set; } public string NoteText { get; set; } public DateTime? NoteDt { get; set; } } public class Person { public Guid PersonID { get; set; } public string Surname { get; set; } public string Forename { get; set; } public DateTime? DOB { get; set; } } class CaseConductor { public String CaseID{get;set;} public Person Person { get; set; } public List&lt;Note&gt; CaseNoteList { get; set; } } </code></pre>
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    1. PO.Net Get Property Values of Object by Key, to any depth
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    1. COI suppose I should mention, if your classes have a lot of properties and / or your searching very deep into a class you're likely to get fairly poor performance because of the reflection.
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    2. COOK, thanks, I will have a go at this. Wrt to poor performance and reflection, ( and the object boxing ...) ... I only need fast enough. I guess making GetPropertyValue<T>( this T object) generic will help , ... onwards and upwards ...
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    3. COEdited answer to make the recursive call generic.
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