C# Method to find all duplicate elements in a list

This article describes the method of finding all recurring elements in a list in C#. Share it for your reference. The specific implementation method is as follows:

public T[] GetDuplicates(T inputValue)
{
  List<T> duplicates = new List<T>( );
  for (int i = 0; i < ; i++)
  {
    if (this[i].Equals(inputValue))
    {
      (this[i]);
    }
  }
  return (( ));
}

I hope this article will be helpful to everyone's C# programming.