public void Case2()
{
// Arrange
SingleNumberProblem obj = new SingleNumberProblem();
int[] num = new int[] { 4, 1, 2, 1, 2 };
int expected = 4;
// Act
int actual = obj.SingleNumber(num);
// Assert
Assert.Equal(expected, actual);
}
public void SingleNumberProblem()
{
var solution = new SingleNumberProblem();
Assert.Equal(3, solution.SingleNumber(new int[] { 1, 2, 1, 2, 3 }));
}