Gem.cs

Task save = new Task(new Action(() => _orderService.SaveOrderParametersAsync(parameters)));
save.Start();
Task.WaitAny(new Task[] { save });

Generics.cs

public class DoubleUpDown : CommonUpDown<double>
{
    protected override object ValidateValue(object value) // yeah we use object here and duplicate it (same with a bunch of methods more)
    {
        double v = (double)value;

        if (v > this.MaxValue)
        {
            v = this.MaxValue;
        }
        if (v < this.MinValue)
        {
            v = this.MinValue;
        }

        return v;
    }
}

Test.cs

public event PropertyChangedEventHandler PropertyChanged
{
    add { _propertyChanged += value; }
    remove { _propertyChanged += value; } // += here then comment out the test that catches it!!!
}