var doubleEnumerable = System.Linq.Enumerable.Range(0, 1).Select(i => (double)i);
 
foreach (int x in doubleEnumerable) {
	System.Console.WriteLine($"{x}");
}
 
#if true
foreach (var e in doubleEnumerable) {
	int x = e;
	System.Console.WriteLine($"{x}");
}
#endif