Except - 1

Query

public void Linq52()
{
    int[] numbersA = { 0, 2, 4, 5, 6, 8, 9 };
    int[] numbersB = { 1, 3, 5, 7, 8 };
  
    IEnumerable aOnlyNumbers = numbersA.Except(numbersB);
  
    Console.WriteLine("Numbers in first array but not second array:");
    foreach (var n in aOnlyNumbers)
    {
        Console.WriteLine(n);
    }
}

Lambda Expression

public void Linq52()
{
    int[] numbersA = { 0, 2, 4, 5, 6, 8, 9 };
    int[] numbersB = { 1, 3, 5, 7, 8 };
 
    IEnumerable aOnlyNumbers = numbersA.Except(numbersB);
 
    Console.WriteLine("Numbers in first array but not second array:");
    foreach (var n in aOnlyNumbers)
    {
        Console.WriteLine(n);
    }
}

Output

Numbers in first array but not second array:
0
2
4
6
9