C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
using System.Collections.Generic;

					
public class Program
{

	public static IEnumerable<int> TestBreakAndYieldReturn(int[] items)
	{
		for (int i = 0; i < items.Length; i++)
		{
			if (i >= 2)
			{				
				break;
			}
			yield return items[i];
		}	
		Console.WriteLine("You called TestBreak.");
		yield return 666;
	}
	

	public static IEnumerable<int> TestYieldBreakAndYieldReturn(int[] items)
	{
		for (int i = 0; i < items.Length; i++)
		{
			if (i >= 2)
			{				
				yield break;
			}
			yield return items[i];
		}	
		Console.WriteLine("You called TestYieldBreak.");
		yield return 666;
	}
	
	public static IEnumerable<int> TestWithoutYield(int[] items)
	{
		var result = new List<int>();
		for (int i = 0; i < items.Length; i++)
		{
			if (i >= 2)
			{				
				break;
			}
			result.Add(items[i]);
		}	
		Console.WriteLine("You called TestWithoutYield.");
		result.Add(666);
		return result;
	}

	public static void Main()
	{
		var itemsIn = new [] {100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115};

		Console.WriteLine("--- TestWithoutYield ---");		
		var itemsOut3 = TestWithoutYield(itemsIn);
		foreach(var i in itemsOut3)
		{
			Console.WriteLine(i);		
		}

		Console.WriteLine("--- TestBreakAndYieldReturn ---");		
		var itemsOut1 = TestBreakAndYieldReturn(itemsIn);
		foreach(var i in itemsOut1)
		{
			Console.WriteLine(i);		
		}
	
		Console.WriteLine("--- TestYieldBreakAndYieldReturn ---");		
		var itemsOut2 = TestYieldBreakAndYieldReturn(itemsIn);
		foreach(var i in itemsOut2)
		{
			Console.WriteLine(i);		
		}
	}
}

​x
 
using System;
using System.Collections.Generic;
​
                    
public class Program
{
​
    public static IEnumerable<int> TestBreakAndYieldReturn(int[] items)
    {
        for (int i = 0; i < items.Length; i++)
        {
            if (i >= 2)
            {               
                break;
            }
            yield return items[i];
        }   
        Console.WriteLine("You called TestBreak.");
        yield return 666;
    }
    
​
    public static IEnumerable<int> TestYieldBreakAndYieldReturn(int[] items)
    {
        for (int i = 0; i < items.Length; i++)
        {
            if (i >= 2)
            {               
                yield break;
            }
            yield return items[i];
        }   
        Console.WriteLine("You called TestYieldBreak.");
        yield return 666;
    }
    
    public static IEnumerable<int> TestWithoutYield(int[] items)
    {
        var result = new List<int>();
        for (int i = 0; i < items.Length; i++)
        {
            if (i >= 2)
            {               
                break;
            }
            result.Add(items[i]);
        }   
        Console.WriteLine("You called TestWithoutYield.");
        result.Add(666);
        return result;
    }
​
    public static void Main()
    {
        var itemsIn = new [] {100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115};
​
        Console.WriteLine("--- TestWithoutYield ---");      
        var itemsOut3 = TestWithoutYield(itemsIn);
        foreach(var i in itemsOut3)
        {
            Console.WriteLine(i);       
        }
​
        Console.WriteLine("--- TestBreakAndYieldReturn ---");       
        var itemsOut1 = TestBreakAndYieldReturn(itemsIn);
        foreach(var i in itemsOut1)
        {
            Console.WriteLine(i);       
        }
    
        Console.WriteLine("--- TestYieldBreakAndYieldReturn ---");      
        var itemsOut2 = TestYieldBreakAndYieldReturn(itemsIn);
        foreach(var i in itemsOut2)
        {
            Console.WriteLine(i);       
        }
    }
}

Serialized outer thing: {"Thing":{"$type":1,"Id":"fc47695a-16e8-4e10-af49-ef99e583e5ee","Name":"outer object thing","Description":null}}
Outer thing Id: fc47695a-16e8-4e10-af49-ef99e583e5ee Name: outer object thing
Serialized container thing: {"Things":[{"$type":1,"Id":"2a956505-ffe4-4cad-890b-eac8a316308e","Name":"container thing","Description":null}]}
Container thing Id: 2a956505-ffe4-4cad-890b-eac8a316308e Name: container thing
Serialized thing by itself: {"Id":"b33e6db8-0de6-4454-8696-807e00dbdb50","Name":"thing by itself","Description":null}
Unhandled exception. System.NotSupportedException: Deserialization of interface types is not supported. Type 'IThing'. Path: $ | LineNumber: 0 | BytePositionInLine: 6.
---> System.NotSupportedException: Deserialization of interface types is not supported. Type 'IThing'.
   --- End of inner exception stack trace ---
   at System.Text.Json.ThrowHelper.ThrowNotSupportedException(ReadStack& state, Utf8JsonReader& reader, NotSupportedException ex)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 utf8Json, JsonTypeInfo jsonTypeInfo, Nullable`1 actualByteCount)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 json, JsonTypeInfo jsonTypeInfo)
   at Program.Main()
Command terminated by signal 6

Last Run:	12:23:45 am
Compile:	0.058s
Execute:	0.28s
Memory:	10.59Mb
CPU:	0.338s

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