c# - Version mismatch issue when using LastWriteTime.Ticks -

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i had code 

dataset.dataversion.adddataversionrow((new fileinfo(path + permissionfile)).lastwritetime.ticks);

but when changed getting other functionality not working,i dont know why not working.this modified ,not working code

long version = (new fileinfo(path + permissionfile)).lastwritetime.ticks;                 if (dataset.dataversion.count == 0)                 {                     dataset.dataversion.adddataversionrow(version);                 }                 else if (version > dataset.dataversion[0].version)                 {                     dataset.dataversion[0].version = version;                 }

do need add 1 more else loop here

hard answer without more information, maybe want update last entry in dataversion:

int count = dataset.dataversion.count; if (count == 0) {     dataset.dataversion.adddataversionrow(version); } else if (version > dataset.dataversion[count-1].version) {     dataset.dataversion[count-1].version = version; }

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