c# - Copy multi dimension array fast -

i have following code , want know fastest way copy _zobrist , _hashenpassant arrays?

internal void inithash() {     int32 i;     ( = 0; < 2; i++ )         ( int32 j = 0; j < 6; j++ )             ( int32 k = 0; k < 64; k++ )                 _zobrist[ i, j, k ] = hashrand();      ( = 0; < 64; ++i )         _hashenpassant[ ] = hashrand(); } 

the reason chess engine creates multiple analysis boards , rather recreating new boards scratch clone existing board. issue having calling inithash() method or doing simple copy slow.

i have looked @ this , not sure how modify work uint64 types.

from here: http://msdn.microsoft.com/en-us/library/z50k9bft%28v=vs.110%29.aspx

if looks need copy total number of elements in array using array.com

array.copy( myobjarray, 0, myintarray, 0, numelements ); 

numelements 2*6*64?

just show api declaration website , values use:

public static void copy(     array sourcearray,     int sourceindex,     array destinationarray,     int destinationindex,     int length ) 

values:

sourceindex = 0 destinationindex = 0 length = x*y*z (array dimension lengths)