c# - Shifting bits of 64Bit Ints getting error -


i'm experimenting bit shifting using uint64 data type. code works expected when use constant number. however, fails when use variable. compiler issues "operator << cannot applied operands of type 'int' , 'ulong'" error. how go fixing code can use variable in place of constant number? here's excerpt of code

using system.io; using system;  class program {     static void main()     {        uint64 x=0;        int pos = 2;        x = ((uint64)x | (1 << pos));        console.writeline(x);     } }

try making right-hand side operand of |-operator of type uint64, e.g.:

x = x | (1ul << pos);

btw, 1 may prefer compound form:

x |= 1ul << pos;

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