FIle delete exception

Question

string FilePath = @"D:\WebSite1\Folder\open.txt";

try

{

System.IO.File.CreateText(FilePath);

bool fileExist = false;

while (!fileExist)

{

FileInfo sFile = new FileInfo(@"D:\WebSite1\Folder\close.txt");

fileExist = sFile.Exists;

}

System.IO.File.Delete(@"D:\WebSite1\Folder\open.txt");

System.IO.File.Delete(@"D:\WebSite1\Folder\close.txt");

}

catch (Exception ex)

{

}

 

 

 

 

above code throws ex of The process cannot access the file 'D:\\WebSite1\\Folder\\open.txt' because it is being used by another process.