C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
using System.Collections.Generic;
using System.Linq;
					
public class Program
{
	public static void Main()
	{
		var originalFormItems = new List<FormModel>
		{
			new FormModel(PrmType.WHEELCHAIR, false),
			new FormModel(PrmType.DEAF, true),
			new FormModel(PrmType.MENTAL, false),
			
		};
		
		var checkedItems = originalFormItems.Where(x=>x.IsChecked).ToList();
		
		var currentFormItems = new List<FormModel>
		{
			new FormModel(PrmType.WHEELCHAIR, false),
			new FormModel(PrmType.DEAF, false),
			new FormModel(PrmType.MENTAL, false),
			
		};
		
		var currentCheckedItems = currentFormItems.Where(x=>x.IsChecked).ToList();
		
		var result = currentCheckedItems.Count != currentCheckedItems.Join(checkedItems,
                                                    y => new {y.Type, y.IsChecked},
                                                    y => new {y.Type, y.IsChecked}, (a, b) => true).Count();
		if(result)
		{
			Console.WriteLine("Form is modified");
		}
		
		else
		{
			Console.WriteLine("Form is the same");
		}
	}
}

public class FormModel
{
	public PrmType Type {get; set;}
	public bool IsChecked {get; set;}
	
	public FormModel(PrmType type, bool isChecked)
	{
		Type = type;
		IsChecked = isChecked;
	}
}

public enum PrmType
{
	WHEELCHAIR, DEAF, MENTAL
}

​x
 
using System;
using System.Collections.Generic;
using System.Linq;
                    
public class Program
{
    public static void Main()
    {
        var originalFormItems = new List<FormModel>
        {
            new FormModel(PrmType.WHEELCHAIR, false),
            new FormModel(PrmType.DEAF, true),
            new FormModel(PrmType.MENTAL, false),
            
        };
        
        var checkedItems = originalFormItems.Where(x=>x.IsChecked).ToList();
        
        var currentFormItems = new List<FormModel>
        {
            new FormModel(PrmType.WHEELCHAIR, false),
            new FormModel(PrmType.DEAF, false),
            new FormModel(PrmType.MENTAL, false),
            
        };
        
        var currentCheckedItems = currentFormItems.Where(x=>x.IsChecked).ToList();
        
        var result = currentCheckedItems.Count != currentCheckedItems.Join(checkedItems,
                                                    y => new {y.Type, y.IsChecked},
                                                    y => new {y.Type, y.IsChecked}, (a, b) => true).Count();
        if(result)
        {
            Console.WriteLine("Form is modified");
        }
        
        else
        {
            Console.WriteLine("Form is the same");
        }
    }
}
​
public class FormModel
{
    public PrmType Type {get; set;}
    public bool IsChecked {get; set;}
    
    public FormModel(PrmType type, bool isChecked)
    {
        Type = type;
        IsChecked = isChecked;
    }
}
​
public enum PrmType
{
    WHEELCHAIR, DEAF, MENTAL
}
​
​

Unhandled exception. System.Text.Json.JsonException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. Path: $ | LineNumber: 0 | BytePositionInLine: 0.
---> System.Text.Json.JsonReaderException: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. LineNumber: 0 | BytePositionInLine: 0.
   at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan`1 bytes)
   at System.Text.Json.Utf8JsonReader.Read()
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state)
   --- End of inner exception stack trace ---
   at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, JsonReaderException ex)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.Deserialize(Utf8JsonReader& reader, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 utf8Json, JsonTypeInfo`1 jsonTypeInfo, Nullable`1 actualByteCount)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 json, JsonTypeInfo`1 jsonTypeInfo)
   at Program.Main()
Command terminated by signal 6

Last Run:	3:02:13 am
Compile:	0.01s
Execute:	0.2s
Memory:	11.22Mb
CPU:	0.21s

View IL Code