C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
using System.Collections.Generic;
using System.Linq;
					
public class Program
{
	class A 
	{
		public int id;
	}
	
	class B 
	{
		public int id;
	}
	
	public static void Main()
	{
		var listA = new List<A>() { new A() { id = 4 }, new A() { id = 5 }, new A() { id = 1 } };
		var listB = new List<B>() { new B() { id = 1 }, new B() { id = 4 }, new B() { id = 5 } };
		
		Console.WriteLine("listB (before):");
		
		foreach (var b in listB)
			Console.WriteLine(b.id);
		
		listB = listB.OrderBy(b => listA.FindIndex(a => a.id == b.id)).ToList();
		
		Console.WriteLine("\nlistB (after):");
		
		foreach (var b in listB)
			Console.WriteLine(b.id);
	}
}

 
using System;
using System.Collections.Generic;
using System.Linq;
                    
public class Program
{
    class A 
    {
        public int id;
    }
    
    class B 
    {
        public int id;
    }
    
    public static void Main()
    {
        var listA = new List<A>() { new A() { id = 4 }, new A() { id = 5 }, new A() { id = 1 } };
        var listB = new List<B>() { new B() { id = 1 }, new B() { id = 4 }, new B() { id = 5 } };
        
        Console.WriteLine("listB (before):");
        
        foreach (var b in listB)
            Console.WriteLine(b.id);
        
        listB = listB.OrderBy(b => listA.FindIndex(a => a.id == b.id)).ToList();
        
        Console.WriteLine("\nlistB (after):");
        
        foreach (var b in listB)
            Console.WriteLine(b.id);
    }
}

Tell me and I forget.
Teach me and I remember.
Involve me and I learn.            Pad Unicode \u0080 next line
by Benjamin Franklin.
in 510706 ticks

-------- StringReader Issue ----------------
is string '\0' empty or null = False
is string '\0' whitespace or null = False
is char '\0' char.IsWhiteSpace = False
is char '\0' char.IsControl = True
is string '\0080' empty or null = False
is string '\0080' whitespace or null = False
Tell me and I forget.
Teach me and I remember.
Involve me and I learn.

   Pad Unicode \u0080 next line

by Benjamin Franklin.
in 566707 ticks

-------- StringReader Final ----------------
Tell me and I forget.
Teach me and I remember.
Involve me and I learn.
   Pad Unicode \u0080 next line
by Benjamin Franklin.
in 449406 ticks

-------- Regex ----------------
Tell me and I forget.
Teach me and I remember.
Involve me and I learn.            Pad Unicode \u0080 next line

by Benjamin Franklin.

in 9215215 ticks

Cached Result
Last Run:	10:04:02 am
Compile:	0.019s
Execute:	0.06s
Memory:	5.19Mb
CPU:	0.079s

View IL Code