using System;
using System.Collections.Generic;
using System.Linq;

public class Test
{
	public static void Main()
	{
		var mylist = new List<double> { 1, 5, 8, 10, 12 };
        double p = 12;

        var result = mylist.Where(x => x > p).Take(1).SingleOrDefault();
		
		
	}
	
}