C# double count of digits after point?

Convert.ToSingle(myValue).ToString("N2");

How to copy a folder to new location in c# recursively?

public void CopyFolder(string sourceFolder, string destFolder)
{
if (!Directory.Exists(destFolder))
Directory.CreateDirectory(destFolder);

string[] files = Directory.GetFiles(sourceFolder);
string[] folders = Directory.GetDirectories(sourceFolder);

foreach (string file in files)
{
string name = Path.GetFileName(file);
string dest = Path.Combine(destFolder, name);
File.Copy(file, dest);
}

foreach (string folder in folders)
{
string name = Path.GetFileName(folder);
string dest = Path.Combine(destFolder, name);
CopyFolder(folder, dest);
}
}