Refactoring large constructors

Question

We have a few objects in our domain model with what you would comically term offensively large constructors, so large that IntelliSense gives up tr

Answer 1

I would go with the container types and use the immediate properties assignment of C# 4.0. This way one could easily use Intellisense on the resulting type, while still retaining a decent decoupling from the original type.

For example:

public class MyLegacyType
{
    public MyLegacyType(MyConfiguration configuration) // etc
    {
      // ...
    }
}

public class MyConfiguration
{
   public int Value1 { get; set; }
   public int Value2 { get; set; }
   // ...
}

And then:

var myInstance = new MyLegacyType(new MyConfiguration
{
  Value1 = 123,
  Value2 = 456
});