snippetsmania.com

File locks in CSharp

string filename = "c:\\sample.htm";
FileStream stream = new FileStream(filename, FileMode.Open, FileAccess.Read, 
FileShare.None); //locks file
stream.Close(); //unlocks file
 
// or another variant:
 
string filename = "c:\\sample.htm";
FileStream stream = File.Open(filename, FileMode.Open);
stream.Lock(0, stream.Length); //locks file  
stream.Unlock(0, stream.Length); //unlocks file

Download this snippet

Locks a file for exclusive use.