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C# writing to a specific byte in a binary file

jim

how do i write to a overwrite a specific byte in a binary file? i looked around, but i couldn't figure it out.

i figured out how to write to the file, but it write it at the beginning of the file, is there anyway to write it in the middle of the file? or a specified location?

1 Reply

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Mike Gold19y ago
I think you just need to open the file using the FileStream class for writing, set the Position property you want to write to, call

myFileStream.Position = 121;

or you can call Seek

Then to write to the file
```
public override void Write (
	byte[] array,
	int offset,
	int count
)
```
```
if you are only writing one byte, then call
```
```
myFileStream.Write(new byte[]{abyte}, 0, 1);
```
```
Don't forget to close the filestream when you are finished.
```
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