image processing - Convert int[] to byte[] type pointer in C# -

i require convert int[] byte[] pointer. above required in order able populate entries of writeablebitmap pixel pixel below:

//previewbuffer1 of type byte[] writeablebitmap wb1 = new writeablebitmap(nvidwidth, nvidheight); int k=0; // wb1.pixels of type int[] default byte* data = (byte*) wb1.pixels;  // ****this doesn't work. throws error. how can accomplish this*** (int i=0; i<nvidheight; i++){     (int j=0; j<nvidwidth; j++){         byte grayscaleval = previewbuffer1[k];         data [4*k] = grayscaleval ;         data [4*k + 1] = grayscaleval ;         data [4*k + 2] = grayscaleval ;         k++;     } } 

how byte* pointer wb1.pixels of type int[]?

sounds want treat each int in array sequence of bytes - how bitconverter.getbytes?

byte[] bytes = bitconverter.getbytes(intvalue); 

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if want avoid array copying etc, use unsafe allows pointers (you'd need tick "allow unsafe code" checkbox in project properties):

unsafe static void unsafeconvert(int value) {     byte* bytes = (byte*)&value;     byte first = bytes[0];     ... }