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    copied!<p>Ok I just looked up the <a href="http://www.yoda.arachsys.com/csharp/miscutil/" rel="noreferrer">MiscUtil</a> that Marc posted about and its just awesome. I hope mark doesn't mind me adding the code here.</p> <pre><code>using System; using System.Collections; using System.Collections.Specialized; using System.Collections.Generic; using System.Linq; using System.Text; using System.Reflection; using System.ComponentModel; using System.Linq.Expressions; namespace ConsoleApplication1 { class Program { public class Student { public int Id { get; set; } public string Name { get; set; } public IList&lt;int&gt; Courses { get; set; } public static implicit operator Student(StudentDTO studentDTO) { return PropertyCopy&lt;Student&gt;.CopyFrom(studentDTO); } } public class StudentDTO { public int Id { get; set; } public string Name { get; set; } public IList&lt;int&gt; Courses { get; set; } public static implicit operator StudentDTO(Student student) { return PropertyCopy&lt;StudentDTO&gt;.CopyFrom(student); } } static void Main(string[] args) { Student _student = new Student(); _student.Id = 1; _student.Name = "Timmmmmmmmaaaahhhh"; _student.Courses = new List&lt;int&gt;(); _student.Courses.Add(101); _student.Courses.Add(121); StudentDTO itemT = _student; Console.WriteLine(itemT.Id); Console.WriteLine(itemT.Name); Console.WriteLine(itemT.Courses.Count); } } // COOLEST PIECE OF CODE FROM - http://www.yoda.arachsys.com/csharp/miscutil/ /// &lt;summary&gt; /// Generic class which copies to its target type from a source /// type specified in the Copy method. The types are specified /// separately to take advantage of type inference on generic /// method arguments. /// &lt;/summary&gt; public class PropertyCopy&lt;TTarget&gt; where TTarget : class, new() { /// &lt;summary&gt; /// Copies all readable properties from the source to a new instance /// of TTarget. /// &lt;/summary&gt; public static TTarget CopyFrom&lt;TSource&gt;(TSource source) where TSource : class { return PropertyCopier&lt;TSource&gt;.Copy(source); } /// &lt;summary&gt; /// Static class to efficiently store the compiled delegate which can /// do the copying. We need a bit of work to ensure that exceptions are /// appropriately propagated, as the exception is generated at type initialization /// time, but we wish it to be thrown as an ArgumentException. /// &lt;/summary&gt; private static class PropertyCopier&lt;TSource&gt; where TSource : class { private static readonly Func&lt;TSource, TTarget&gt; copier; private static readonly Exception initializationException; internal static TTarget Copy(TSource source) { if (initializationException != null) { throw initializationException; } if (source == null) { throw new ArgumentNullException("source"); } return copier(source); } static PropertyCopier() { try { copier = BuildCopier(); initializationException = null; } catch (Exception e) { copier = null; initializationException = e; } } private static Func&lt;TSource, TTarget&gt; BuildCopier() { ParameterExpression sourceParameter = Expression.Parameter(typeof(TSource), "source"); var bindings = new List&lt;MemberBinding&gt;(); foreach (PropertyInfo sourceProperty in typeof(TSource).GetProperties()) { if (!sourceProperty.CanRead) { continue; } PropertyInfo targetProperty = typeof(TTarget).GetProperty(sourceProperty.Name); if (targetProperty == null) { throw new ArgumentException("Property " + sourceProperty.Name + " is not present and accessible in " + typeof(TTarget).FullName); } if (!targetProperty.CanWrite) { throw new ArgumentException("Property " + sourceProperty.Name + " is not writable in " + typeof(TTarget).FullName); } if (!targetProperty.PropertyType.IsAssignableFrom(sourceProperty.PropertyType)) { throw new ArgumentException("Property " + sourceProperty.Name + " has an incompatible type in " + typeof(TTarget).FullName); } bindings.Add(Expression.Bind(targetProperty, Expression.Property(sourceParameter, sourceProperty))); } Expression initializer = Expression.MemberInit(Expression.New(typeof(TTarget)), bindings); return Expression.Lambda&lt;Func&lt;TSource,TTarget&gt;&gt;(initializer, sourceParameter).Compile(); } } } } </code></pre>
 

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