How to lock file

Question

please tell me how to lock file in c#

Thanks

Solution

Simply open it exclusively:

using (FileStream fs = 
         File.Open("MyFile.txt", FileMode.Open, FileAccess.Read, FileShare.None))
{
   // use fs
}

Ref.

Update: In response to comment from poster: According to the online MSDN doco, File.Open is supported in .Net Compact Framework 1.0 and 2.0.

Comments

[MusiGenesis]

Not sure this answers the question. OP is looking for the FileStream.Lock method, which doesn't exist in the compact framework. Lock prevents other processes from modifying the file, but still lets them read it. I think your method would block other processes completely.

[MusiGenesis]

@Mitch: and your answer may be exactly what he needs, but if he's trying to find a WinMo way to do what FileStream.Lock does (block write access but not read access, and lock a byte range in the file) then it isn't.

[techno]

@MitchWheat If i open a lot of file streams like this,will this result in memory loss or reduce system performance?