System.Linq.Expressions.Expression.LessThan C# (CSharp) Method

        public static BinaryExpression LessThan(Expression left, Expression right)
        {
            return LessThan(left, right, liftToNull: false, method: null);
        }

            public Expr ToExpression()
            {
                var exitLabel = Expr.Label();
                var loopBody  = Expr.Block(Body.ToExpression(), Expr.PreIncrementAssign(Iterator.ToExpression()));

                return(Expr.Loop(Expr.IfThenElse(Expr.LessThan(Iterator.ToExpression(), UpperBound.ToExpression()), loopBody, Expr.Break(exitLabel)), exitLabel));
            }