public void TestInt64()
{
for (var n = 0; n < sizeof(Int64) * 8; n++)
{
Int64 i = (Int64)1 << n;
Assert.True(i.IsBitSet(n), n.ToString());
}
}
public static string ToBitString(this Int64 x, int length = 64)
{
return(string.Join("", Enumerable.Range(0, length).Select(bit => x.IsBitSet(bit) ? "1" : "0")));
}