From documentation
If first operand is an int or uint
(32-bit quantity), the shift count is
given by the low-order five bits of
second operand.
If first operand is a long or ulong
(64-bit quantity), the shift count is
given by the low-order six bits of
second operand.
Note that i<<1 and i<<33 give the same
result, because 1 and 33 have the same
low-order five bits.
This will be the same as 2^( the actual value of the lower 5 bits ).
So in your case it would be 2^4=16.
