Creating hidden folders

using System.IO; 

string path = @"c:\folders\newfolder"; // or whatever 
if (!Directory.Exists(path)) 
{ 
DirectoryInfo di = Directory.CreateDirectory(path); 
di.Attributes = FileAttributes.Directory | FileAttributes.Hidden; 
}

Yes you can. Create the directory as normal then just set the attributes on it. E.g.

DirectoryInfo di = new DirectoryInfo(@"C:\SomeDirectory");

//See if directory has hidden flag, if not, make hidden
if ((di.Attributes & FileAttributes.Hidden) != FileAttributes.Hidden)
{   
     //Add Hidden flag    
     di.Attributes |= FileAttributes.Hidden;    
}

CreateHiddenFolder(string name)  
{  
  DirectoryInfo di = new DirectoryInfo(name);  
  di.Create();  
  di.Attributes |= FileAttributes.Hidden;  
}  

string path = @"c:\folders\newfolder"; // or whatever 
if (!System.IO.Directory.Exists(path)) 
{ 
    DirectoryInfo di = Directory.CreateDirectory(path); 
    di.Attributes = FileAttributes.Directory | FileAttributes.Hidden; 
}

From here.