Is Func appropriate to use as a ctor arg when applying Dependency Injection?

Question

Example:

public class BusinessTransactionFactory  where T : IBusinessTransaction
{
    readonly Func _createTransactio         


        

Answer 1

In the past, I have used both the pattern you mention (a delegate) and a single method interface. Currently, I tend to prefer the use of a single method interface.

The code required to mock the dependency is easier to read when using an interface and you will also have the ability to take advantage of automatically typed factories, as @devdigital mentions.

Another thing to consider is that you won't have the overhead of a delegate invocation when using an interface, which could be a valid consideration in very high performance applications.