c# - Can't Modify Dictionary Value -

i've been using code try , modify data written file, no matter do, directly assigning null bytes, won't change. trying access dictionary entry seperate class 1 generated in.

buffer.blockcopy(     pio.getbuffer(),      0,      wat.settingentrylist[0x63e83fff].data,      0,          wat.settingentrylist[0x63e83fff].data.length);  buffer.blockcopy(     pio.getbuffer(),      wat.settingentrylist[0x63e83fff].data.length,      wat.settingentrylist[0x63e83ffe].data,      0,      wat.settingentrylist[0x63e83ffe].data.length); 

here variable in class, how initialized dictionary:

public class settingentry {     public byte[] data { get; set; } } 

­ public dictionary settingentrylist = new dictionary();

when writing data file, go through each key so:

foreach (keyvaluepair<int, settingentry> se in settingentrylist) {     pio.writebytes(se.value.data); } 

i have gone through , debugged. once sure key existed , all, used code, in when ran, application stayed in loop until exited:

while (gpd.settingentrylist[0x63e83fff].data != new byte[gpd.settingentrylist[0x63e83fff].data.length]) gpd.settingentrylist[0x63e83fff].data = new byte[gpd.settingentrylist[0x63e83fff].data.length]; 

the dictionary not read only.

you writing bytes not dictionary data property inside value in dictionary.

if want override dictionary entry use -

foreach (keyvaluepair<int, settingentry> entry in settingentrylist) {     var val = new settingsentry() { data = new datatype() };     pio.writebytes(val.data);     entry.value = val; }