I want to compare 2 hash sets and take out the differences

Question

I have 2 hash sets like this.

Hash_1 = {1, 2, 3, 4, 5}
Hash_2 = {4, 5, 6, 7, 8}

I am using C#

I want to compare those two sets and want to get the output like

Hash_3 = {1, 2, 3, 6, 7, 8}

Answer 1

Or you could use SymmetricExceptWith

Modifies the current HashSet<T> object to contain only elements that are present either in that object or in the specified collection, but not both.

var h1 = new HashSet<int>() { 1, 2, 3, 4, 5 };
var h2 = new HashSet<int>() { 4, 5, 6, 7, 8 };

h1.SymmetricExceptWith(h2);

Console.WriteLine(string.Join(",", h1));

Output

1,2,3,7,6,8

Internally it just uses

foreach (T item in other)
{
   if (!Remove(item))
   {
      AddIfNotPresent(item);
   }
}

Source Code here