Planet-D, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Plts
    {
        public string name;
        public int xCord;
        public int numberBlts;
        public string color;
            
    }
    public class Program
    {
        public static void Main(string[] args)
        {
            Program classProg = new Program ();
            List<Plts> listPlts = new List<Plts>();
            listPlts.Add(new Plts {name = "HRed", xCord = 4, numberBlts = 10, color = "red"});
            listPlts.Add(new Plts {name = "HBlue", xCord = 12, numberBlts = 10, color = "blue"});
            listPlts.Add(new Plts {name = "net1", xCord = 11, numberBlts = 20, color = "gray"});
            listPlts.Add(new Plts {name = "net2", xCord = 5, numberBlts = 20, color = "gray"});
            listPlts.Add(new Plts {name = "net3", xCord = 8, numberBlts = 30, color = "gray"});
            
            foreach (Plts llistPlst in listPlts)
                Console.Write(" | Основа1: " + llistPlst.name);
            
            Console.WriteLine("");
            
            classProg.BPlrs(listPlts);
            
             Console.WriteLine("");
            
            foreach (Plts llistPlst in listPlts)
                Console.Write(" | Основа2: " + llistPlst.name);
            
            Console.WriteLine("");
        }
        
        public void BPlrs(List<Plts> l)
        {
            string str = "blue";
            var lBluePlts =  from list in l
                    where list.color ==str
                    select list;
                
            if (lBluePlts.Count() == 0)
                 Console.Write(" Ноль! ");
            foreach (Plts lDemo in lBluePlts)
            {
                
                Console.Write(" | " + lDemo.name + " и " + lDemo.numberBlts);
            
            }

}
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,22 sec, absolute running time: 0,17 sec, cpu time: 0,17 sec, average memory usage: 16 Mb, average nr of threads: 3, absolute service time: 0,41 sec