OrderSystem/OrderSystem.Entity/Extensions/ExpressionBuilder.cs

using Bowin.Common.Linq;
using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Text;

namespace OrderSystem.Entity.Extensions
{
    public static class ExpressionBuilder
    {
        public static Expression<Func<T, bool>> AndIf<T>(this Expression<Func<T, bool>> first, bool condition, Expression<Func<T, bool>> second)
        {
            return condition ? first.Compose(second, Expression.AndAlso) : first;
        }
    }
}