How to automatically map the values between instances of two different classes if both have same properties?

Question

I have two classes with exactly same members (properties and fields) with same datatypes. I want to map the members from one to other in automated way. I know there are more

Answer 1

Extending from accepted answer from @pasty, I have created generic method for this purpose.

public static TDest MapSourceToDest(TSource source)
                                    where TSource : class//We are not creating an instance of source, no need to restrict parameterless constructor
                                    where TDest : class, new()//We are creating an instance of destination, parameterless constructor is needed
{
    if(source == null)
        return null;

    TDest destination = new TDest();

    var typeOfSource = source.GetType();
    var typeOfDestination = destination.GetType();

    foreach(var fieldOfSource in typeOfSource.GetFields())
    {
        var fieldOfDestination = typeOfDestination.GetField(fieldOfSource.Name);
        if(fieldOfDestination != null)
        {
            try
            { fieldOfDestination.SetValue(destination, fieldOfSource.GetValue(source)); }
            catch(ArgumentException) { }//If datatype is mismatch, skip the mapping
        }
    }

    foreach(var propertyOfSource in typeOfSource.GetProperties())
    {
        var propertyOfDestination = typeOfDestination.GetProperty(propertyOfSource.Name);
        if(propertyOfDestination != null)
        {
            try
            { propertyOfDestination.SetValue(destination, propertyOfSource.GetValue(source)); }
            catch(ArgumentException) { }//If datatype is mismatch, skip the mapping
        }
    }

    return destination;
}

One may need to alter the filters on generic types; but everything else will work cross any types. Null check is added for fieldOfDestination and propertyOfDestination just in case a member is missing; this adds up little more flexibility.