// PROJECT-EXAMPLE
if (int.TryParse("12", out int number))
    System.Console.WriteLine(number);

Method(out value) / interface IProducer<out T>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        if (int.TryParse("42", out int number)) Console.WriteLine(number);
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        IProducer<string> text = new TextProducer();
        IProducer<object> value = text;
        Console.WriteLine(value.Create());
    }
}
public interface IProducer<out T> { T Create(); }
public class TextProducer : IProducer<string> { public string Create() => "ore"; }