How to move a file that has no file extension? C#

Question

if (File.Exists(@\"C:\\\\Users\" + Environment.UserName + \"\\\\Desktop\\\\test\"))
{                                                                /\\
                         


        

Answer 1

You can get all files without extension in this way:

var files = Directory.EnumerateFiles(@"C:\Users\Username\Desktop\")
    .Where(fn => string.IsNullOrEmpty(Path.GetExtension(fn)));

Now you can loop them and change the extension:

foreach (string filePath in filPaths)
{
    string fileWithNewExtension = Path.ChangeExtension(filePath, ".txt");
    string newPath = Path.Combine(Path.GetDirectoryName(filePath), fileWithNewExtension);
    File.Move(filePath, newPath);
}

As you can see, the Path-class is a great help.

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Update: if you just want to change the extension of a single file that you already know it seems that Dasanko has already given the answer.