C# Access denied to path in a Windows Application

My Guess-1:
Either you are not closing your StreamWriter object

Guess-2: Or you may have this kind of problem:

One time in my company, a security patch came and we started getting error of our already installed Test Tool application in which we were writing files for logging purpose in a specific folder. That security patch basically was setting that folder and its files to "Read Only".
So we fix this by setting files properties as NORMAL:

private void SetMapFilesAttributes()        
{            
try            
{               
// Get the File Location from app.config                
String sFileLocation = ConfigurationManager.AppSettings["Data_Location"];
// Get all the file collection from that directory   
string[] fileCollection = Directory.GetFiles(sFileLocation);       
// Setting attribute for each file   
             
foreach (String file in fileCollection)                
{                  
    File.SetAttributes(file, FileAttributes.Normal);          
}            
}            
catch (Exception ex)            
{                
      throw ex;            
}        
}



If it helps you, pls mark it accepted.
Thanks

 Provide write access to ASP.NET account...

 You already have one thread active, do not create duplicates..

 http://www.c-sharpcorner.com/Forums/Thread/193788/help-with-setup-project.aspx