var connectionVtex = new Connection(); // Fill in your details
ServiceLocator.Register(() => new VTEXContext(connectionVtex), LifeStyle.Singleton);

public class MyClass
{
    private readonly VTEXContext _vtexContext;

    public MyClass(VTEXContext vtexContext)
    {
        _vtexContext = vtexContext ?? throw new ArgumentNullException(nameof(vtexContext));
    }
}

var vtexContext = ServiceLocator.Resolve<VTEXContext>();

var vtex = new VTEXContext("store name", "app-key-xyz", "app-token-secret-hash");
var order = vtex.GetOrder("V-123456789-01");
Console.WriteLine($"Sequence: {order.Sequence} | Value: {order.Value}");