byte[] buffer2 = new byte[4294743227]; // string with System.OverflowException
The number 4294743227 is uint.
Why do i get exception?
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4that is nearly 4 gigs of storage! – Daniel A. White Jun 15 '18 at 19:10
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2i wouldn't use a `uint`, try using `long`. – Daniel A. White Jun 15 '18 at 19:13
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@maccettura, yes ofc. – unnamed Jun 15 '18 at 19:14
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@DanielA.White Actually, it's closer to 16 gigs. He's trying to allocate more than 4 billion ints, each of which occupies 4 bytes. – Jim Mischel Jun 15 '18 at 20:47
1 Answers
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According to this question, the maximum size of an array is System.Int32.MaxValue, which is 2,147,483,647.
See also the documentation on System.Array:
By default, the maximum size of an Array is 2 gigabytes (GB). In a 64-bit environment, you can avoid the size restriction by setting the enabled attribute of the gcAllowVeryLargeObjects configuration element to true in the run-time environment. However, the array will still be limited to a total of 4 billion elements, and to a maximum index of 0X7FEFFFFF in any given dimension (0X7FFFFFC7 for byte arrays and arrays of single-byte structures).
Bart Friederichs
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