public void GenerateOneMillionInt64_WithRngProvider_ShouldBeUnique()
{
const int count = 1000000;
var numbersHolder = new long[count];
using var rngProvider = new RNGCryptoServiceProvider();
for (var i = 0; i < count; i++)
{
numbersHolder[i] = rngProvider.GetInt64(13);
}
numbersHolder.Should().NotBeEmpty().And.NotContainNulls().And.HaveCount(count).And.OnlyHaveUniqueItems();
}