Pass lookup value from one to another

In order to pass one datatime field to another I do this:

DynamicEntity leadEntity = new DynamicEntity(EntityN开发者_运维百科ame.lead.ToString());               
CrmDateTime modifiedby = (CrmDateTime)myImage.Properties["modifiedby"];
CrmDateTimeProperty dtAssignedBy = new CrmDateTimeProperty
                (
                    "new_assignedbyid",
                    modifiedby
                );
leadEntity.Properties.Add(dtAssignedBy);

How do I do the same for lookups? if 'modifiedby' and 'new_assignedbyid' were lookups, how can I pass the chosen value of

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The following link has a good overview

http://msdn.microsoft.com/en-us/library/bb959615.aspx

There are two main properties - value and type which must be set for the lookup to be valid.

So you could do something like:

var modifiedby = (Lookup)myImage.Properties["modifiedby"];
var new_modifiedby = new Lookup();
new_modifiedby.value = modifiedby.value;
new_modifiedby.type = modifiedby.type;

Although you could probably just as easily do

var new_modifiedby = (Lookup)myImage.Properties["modifiedby"];

But I haven't verified that one.