protected void Page_Load(object sender, EventArgs e)
 {
     List<Project> list=new List<Project>()
         {
             new Project()
                 {
                     Name = "aa",Price = 23.5
                 },
                 new Project()
                 {
                     Name = "aa",Price = 23.5
                 },
                 new Project()
                 {
                     Name = "aa",Price = 23.5
                 },
                 new Project()
                 {
                     Name = "aa",Price = 23.5
                 },
                 new Project()
                 {
                     Name = "aa",Price = 23.5
                 },
                 new Project()
                 {
                     Name = "aa",Price = 23.5
                 },
                 new Project()
                 {
                     Name = "aa",Price = 23.5
                 },
                 new Project()
                 {
                     Name = "aa",Price = 23.5
                 },
                 new Project()
                 {
                     Name = "aa",Price = 23.5
                 }
         };
     Response.Write(list.Sum(p => p.Price));
 }