foo.cs

extern alias Assembly1;
extern alias Assembly2;
// ...

public sealed class Container {
  private readonly Assembly1::Foo.A m_Assembly1__Foo_A;
  private readonly Assembly1::Foo.B m_Assembly1__Foo_B;
  private readonly Assembly1::Foo.C m_Assembly1__Foo_C;
  private readonly Assembly2::Bar.D m_Assembly2__Bar_D;
  private readonly Assembly2::Bar.E m_Assembly2__Bar_E;
  // ...
  
  private Container(
    Assembly1::Foo.A _Assembly1__Foo_A,
    Assembly1::Foo.B _Assembly1__Foo_B,
    Assembly1::Foo.C _Assembly1__Foo_C,
    Assembly2::Foo.D _Assembly2__Foo_D,
    Assembly2::Foo.E _Assembly2__Foo_E,
    // ...
  ) {
    m_Assembly1__Foo_A = _Assembly1__Foo_A;
    m_Assembly1__Foo_B = _Assembly1__Foo_B;
    m_Assembly1__Foo_C = _Assembly1__Foo_C;
    m_Assembly2__Foo_D = _Assembly2__Foo_D;
    m_Assembly2__Foo_E = _Assembly2__Foo_E;
    // ...
  }
  
  public static Container Create() {
    var _Assembly1__Foo_A = new Assembly1::Foo.A();
    var _Assembly1__Foo_B = new Assembly1::Foo.B(_Assembly1__Foo_A);
    var _Assembly1__Foo_C = new Assembly1::Foo.C(_Assembly1__Foo_A);
    var _Assembly2__Foo_D = new Assembly1::Foo.C(_Assembly1__Foo_B, _Assembly1__Foo_B);
    var _Assembly2__Foo_E = new Assembly1::Foo.C(_Assembly1__Foo_A, _Assembly2__Foo_D);
    
    // ...
    
    return new Container(
      _Assembly1__Foo_A,
      _Assembly1__Foo_B,
      _Assembly1__Foo_C,
      _Assembly1__Foo_D,
      _Assembly1__Foo_E,
      //...
    );
  }
  
  public T Get<T>() {
    var typeName = typeof(T).AssemblyQualifiedName;
    
    switch(typeName) {
      case "Assembly1,Foo.A": return (T)m_Assembly1__Foo_A;
      case "Assembly1,Foo.B": return (T)m_Assembly1__Foo_B;
      case "Assembly1,Foo.C": return (T)m_Assembly1__Foo_C;
      case "Assembly2,Foo.D": return (T)m_Assembly2__Foo_D;
      case "Assembly2,Foo.E": return (T)m_Assembly2__Foo_E;
      // ...
      default: throw new Exception();
    }
  }
}