long on a 64 bit machine

Question

Is a long 128 bits on a 64 bit machine?

Edit: Duplicate question; see http://stackoverflow.com/questions/651956/sizeofint-on-x64.

Answer 1

Nope ... 64 bits

Answer 2

On both 32-bit and 64-bit machines:

• long is 64-bit, it's a synonym for System.Int64.
• int is 32-bit, it's a synonym for System.Int32.

Answer 3

Duplicate question. Good answers here:

http://stackoverflow.com/questions/651956/sizeofint-on-x64

Answer 4

long.MinValue and long.MaxValue are your friend

Answer 5

Scott Hanselman put together a good summary of 32 vs 64 bit issues with .Net.

You can find the post here.