public static void ExampleForMDoerner()
{
    var left = Expression.Constant(5);
    var right = Expression.Constant(3);

    var body = Expression.GreaterThanOrEqual(left, right);

    var expr = Expression.Lambda<Func<bool>>(body).Compile();

    var result = expr.Invoke();
}

public static void Overview()
{
    var value = Expression.Parameter(typeof(int), "value");

    var result = Expression.Parameter(typeof(int), "result");

    var label = Expression.Label(typeof(int));

    var block = Expression.Block(
            new[] { result },
            Expression.Assign(result, Expression.Constant(1)),
            Expression.Loop(
                Expression.IfThenElse(
                    Expression.GreaterThan(value, Expression.Constant(1)),
                    Expression.MultiplyAssign(result,

public static int OverviewRewritten(int param)
{
    int value = param;
    int result;
    {
        result = 1;

        do
        {
            if (value > 1)
            {
                result *= value--;
            }
            else
            {
                break;
            }
        } while (true);
    }

    return result;
}

public static int OverviewRewritten(int param)
{
    int value = param;
    int result;
    {
        result = 1;

        do
        {
            if (value > 1)
            {
                result *= value--;
            }
            else
            {
                goto unnamedLabel;
            }
        } while (true);
    }

unnamedLabel:
    return result;
}

public static void ContinueExpressionRewritten(int param)
{
    int count = param;
    {
        continueLabel:

        if (count > 3)
        {
            goto breakLabel;
        }

        ++count;

        Console.WriteLine("Loop");

        goto continueLabel;

        --count;
    }

breakLabel:;
}

public static void GoToExpressionRewritten()
{
    Console.WriteLine("GoTo");
    goto unnamedLabel;
    Console.WriteLine("Other Work");
unnamedLabel:;
}