C#: Generic types that have a constructor?

I have the following C# test code:

  class MyItem
  {
    MyItem( int a ) {}
  }

  class MyContainer< T >
    where T : MyItem, new()
  {
    public void CreateItem()
    {
      T oItem = new T( 10 );
    }
  }

Visual Studio can't compile it, the error is at line where 'new' is used:

'T': cannot provide arguments when creating an instance of a variable type

Is it possible in C# to create an object of generic type with non-parameterless constructor? It's no problem to do such thing in C++ templates, so i'm very curious why i can't do same thing in C#. Maybe some additional 'where' is required or syntax is different?