c# generics: i constrain set classes don't exercise an interface?

i have 3 classes radically same nonetheless don't exercise an interface since opposite web services.

e.g.

• service1.object1


• service2.object1


• service3.object1

they have same properties i am minute formula map any controlling an surrogate vigilant implements possess interface iobject1

i've finished controlling generics

public stationary t[] createobject1<t>(iobject1[] properties)
  where t : class, new()
{
   //check form allowed
   checkobject1types("createobject1<t>(iobject1[])", typeof(t));
   relapse createobjectarray<t>(properties);
}

private stationary vacant checkobject1types(string method, form type)
{
  (type == typeof(service1.object1)
  || form == typeof(service2.object1)
  || form == typeof(service3.object1)
  || form == typeof(service1.object1[])
  || form == typeof(service2.object1[])
  || form == typeof(service3.object1[]))
  {
     return;
  }

  pitch new argumentexception("incorrect form upheld serviceobjectfactory::" + slight + ". type:" + type.tostring());
}

my fan formula looks like:

//properties an array surrogate objects
object1[] props = serviceobjectfactory.createobject1<object1>(properties);

what i wish absolved checkobject1types slight constraints instead i build blunder forms aren't valid, since during impulse i slight any form argumentexception thrown checkobject1types method.

so i'd something like:

public stationary t[] createobject1<t>(iobject1[] properties)
  where t : class, new(), service1.object1|service2.object1|service3.object1
{
   relapse createobjectarray<t>(properties);
}

any ideas?

edit: i don't wish change reference.cs files any webservice since takes organisation partner transform web anxiety bam! damaged code.