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Asked: 2026-06-01T04:15:15+00:00

I trying to compile this code: Int64 itag = BitConverter.ToInt64(temp, 0); itag &= 0xFFFFFFFFFFFFFC00;

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I trying to compile this code: 

Int64 itag = BitConverter.ToInt64(temp, 0);
itag &= 0xFFFFFFFFFFFFFC00;

However this gives me the following error:

Operator ‘&=’ cannot be applied to operands of type ‘long’ and ‘ulong’

How do I do this?

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1 Answer

  1. Editorial Team

    See http://msdn.microsoft.com/en-en/library/aa664674%28v=vs.71%29.aspx .

    If the literal has no suffix, it has the first of these types in which its value can be represented: int, uint, long, ulong.

    You have 

    0xFFFFFFFFFFFFFC00

    but Int64.Max is:

    0x7FFFFFFFFFFFFFFF

    so long is not big enough and ulong is taken as the type of the literal.

    Now you have on the left side a Int64, which is signed, and on the right side you have ulong, however, there is not overload of &= which accepts that combination, which leads to the error.

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