Recursive Algorithm does not work

I've improved some things for the code to be more C # style. I also solved some other problems that the code had that are not in the statement, but if it does not deal it gives error. For lack of a specific definition when something is spelled wrong I assumed what I wanted to solve.

I think the difficulty is the recursive function that the statement does not ask for and there is no need to use it there. This is not a clearly recursive case, it is sequential, so a loop is more interesting.

If you are using an old version you have to declare the variable tamanho out of the TryParse() function before to use.

using static System.Console;

namespace revisao {
    public class Program {   
        public static void Main(string[] args) {
            Write("Digite o tamanho do vetor: ");
            if (int.TryParse(ReadLine(), out var tamanho)) {
                int[] vetor = new int[tamanho];
                for(int i = 0; i < vetor.Length; i++) {
                    Write($"Digite o elemento {i}: ");
                    vetor[i] = int.TryParse(ReadLine(), out var valor) ? valor : 0;
                }
                Imprimir(vetor);
            }
        }
        private static void Imprimir(int[] vetor) {
            WriteLine("Valores divisíveis por 2 e 3 simultaneamente");
            foreach (var item in vetor) {
                if (item % 6 == 0) {
                    WriteLine($"{item}");
                }
            }
        }
    }
}

See running on .NET Fiddle . Also I put GitHub for future reference .

You are asked to print the numbers from 0 to n , n supplied, that are divisible by 2 and 3 simultaneously. As @Maniero realized, it needs to be a multiple of 6.

As the question does not say anything about storing in a vector, or in subsequent entries, there is only one reading for each instance of the problem. This is the point I was dissatisfied with his response and also with the AP's attempt to respond.

using static System.Console;

namespace revisao {
    public class Program {   
        public static void Main(string[] args) {
            Write("Digite n: ");
            if (int.TryParse(ReadLine(), out var n)) {
                WriteLine("Valores divisíveis por 2 e 3 simultaneamente");
                for (int i = 0; i < n; i += 6) {
                    WriteLine($"{i}");
                }
            }
        }
    }
}

Only multiples of 2 and 3 are printed simultaneously.

The recursive function for this would be kind of rough:

public static void imprimeRecursivo(int atual, int n) {
    if (atual < n) {
        WriteLine($"{atual}");
         imprimeRecursivo(atual + 6, n);
    }
}

The first call must pass as atual 0.

If you want to turn it into a head recursion, you'll only need one parameter:

public static void imprimeRecursivoCabeca(int i) {
    if (i >= 0) {
        imprimeRecursivoCabeca(i-1);
        if (i % 6 == 0) {
            WriteLine($"{i}");
        }
    }
}

If you want the interval open in% with%, the first parameter is% with%. Note that it will converge to 0, where it will begin to return from recursions, printing in ascending order the multiple numbers of 6 found.