With NEW SDK "Rewriting sample codes in Quantum Algorithm Implementations for Beginners (Bell state)"

 Since the new SDK does not use Driver.cs, the Bell state example needs to be rewritten without the C# part.

Now you only need to write Program.qs, and the example looks like,
Result is |00> 500, |01> 0, |10> 0, |11> 500. Looks still valid.

namespace QFT_naive {

    open Microsoft.Quantum.Canon;

    open Microsoft.Quantum.Intrinsic;

    open Microsoft.Quantum.Convert;

    

    @EntryPoint()

    operation SayHello() : Unit {

        Message("Hello quantum world!");

        mutable n00 = 0;

        mutable n01 = 0;

        mutable n10 = 0;

        mutable n11 = 0;

        for(trian in 1..1000){

        using ( (qubit0, qubit1) = (Qubit(), Qubit()) ){

            H(qubit0);

            CNOT(qubit0,qubit1);

            let res0 = M(qubit0);

            let res1 = M(qubit1);

            if(res0 == Zero){

                if(res1 == Zero){

                    set n00 += 1;

                }else{

                    set n01 += 1;

                }

            }else{

                if(res1 == Zero){

                    set n10 += 1;

                }else{

                    set n11 += 1;

                }

            }

            Reset(qubit0);

            Reset(qubit1);

        }

        }

        Message(IntAsString(n00));

        Message(IntAsString(n01));

        Message(IntAsString(n10));

        Message(IntAsString(n11));

    }

}