c# - Write empty bytes using binarywriter -

so using binarywriter write strings on original strings, need overwrite whole string in binary file, trying write new string, , overwrite rest of old string 0x00 (empty bytes), tried, not working:

bw.write(enc.getbytes(listview1.items[i].subitems[2].text + (31 - enc.getbytecount(listview1.items[i].subitems[2].text)) * '\0')); 

31 constant int old strings can't tresspass (don't ask me, it's script thingy)

that's because:

number * '\0' = number * 0  ('\0' converted int) => equal 0 

to generate string filled \0 (or char) of length, use:

new string(`\0`, number) 

in case:

string newstr = listview1.items[i].subitems[2].text; bw.write(enc.getbytes(newstr + new string('\0', (31 - enc.getbytecount(newstr)))));