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# “OverloadResolutionBasic” (Problem)

What will the following code display?

```csharp
void Foo(object a)
{
  Console.WriteLine("object");
}
void Foo(object a, object b)
{
  Console.WriteLine("object, object");
}
void Foo(params object[] args)
{
  Console.WriteLine("params object[]");
}
void Foo<T>(params T[] args)
{
  Console.WriteLine("params T[]");
}
class Bar { }
void Main()
{
  Foo();
  Foo(null);
  Foo(new Bar());
  Foo(new Bar(), new Bar());
  Foo(new Bar(), new object());
}
```

[Solution](/problembookdotnet/en/oop/overloadresolutionbasic-s.md)