How do I change my new list without changing the original list?

by

You need to clone your list in your method, because List<T> is a class, so it’s reference-type and is passed by reference.

For example:

List<Item> SomeOperationFunction(List<Item> target)
{
  List<Item> tmp = target.ToList();
  tmp.RemoveAt(3);
  return tmp;
}

Or

List<Item> SomeOperationFunction(List<Item> target)
{
  List<Item> tmp = new List<Item>(target);
  tmp.RemoveAt(3);
  return tmp;
}

or

List<Item> SomeOperationFunction(List<Item> target)
{
  List<Item> tmp = new List<Item>();
  tmp.AddRange(target);
  tmp.RemoveAt(3);
  return tmp;
}

More Related Contents:

  1. Unexpected character error for quotes [closed]
  2. FileSystemWatcher vs polling to watch for file changes
  3. Calling async method synchronously
  4. Why does “abcd”.StartsWith(“”) return true?
  5. CryptographicException: Padding is invalid and cannot be removed and Validation of viewstate MAC failed
  6. dotnet core System.Text.Json unescape unicode string
  7. WPF: How to dynamically Add Controls in dynamically created WPF Window
  8. One or more types required to compile a dynamic expression cannot be found. Are you missing references to Microsoft.CSharp.dll and System.Core.dll?
  9. How to return anonymous type from c# method that uses LINQ to SQL [duplicate]
  10. Unblock File from within .net 4 c#
  11. Convert AM/PM time to 24 hours format?
  12. Where can I store (and manage) Application license information? [closed]
  13. Direct method from SQL command text to DataSet
  14. Error Deserializing Xml to Object – xmlns=” was not expected
  15. Client Id for Property (ASP.Net MVC)
  16. How to store and retrieve credentials on Windows using C#
  17. Which is best for data store Struct/Classes?
  18. How do you get the all properties of a class and its base classes (up the hierarchy) with Reflection? (C#)
  19. What is the maximum resolution of C# .NET Bitmap?
  20. GMail SMTP via C# .Net errors on all ports
  21. Log Queries executed by Entity Framework DbContext
  22. Find the next TCP port in .NET
  23. Async always WaitingForActivation
  24. What is the difference between User Control, Custom Control and Component?
  25. Is this pattern matching expression equivalent to not null
  26. log4net with DI Simple Injector
  27. What is the difference between == and Equals() for primitives in C#?
  28. How to exit all running threads?
  29. Maximum integer value find in list
  30. .indexOf for multiple results

Leave a Comment