Test (and possibly fix/add error messaging around) conflicting dependencies and multiple constructors

[PandaMagnus]

Example:

Class 1 asks for:

public class SomeClass
{
   public SomeClass(int someInt) { // do stuff }
   public SomeClass(string someString) { // do stuff }
}

And the DI setup looks like:

TestBuilder
   .AddDependencyInstance(10)
   .AddDependencyInstance("hello!")

This appears to be a silent failure (real world use case used factory pattern AddDependencyService(Func<,>) which may matter.) This should throw a helpful error that you cannot do this.

Assess if this should be an error on .Build() instead of during a test run.