I have a lot of csv files stored in a directory.
In each csv file need to add the name as column this through powershell.

**Example**

File location: `<SERVERNAME>\Export\FILENAME1.CSV`

Contents:

```
1232;Description;a1
1232;Description;a2

```

The result must be:

```
1232;Description;a1;FILENAME1.CSV
1232;Description;a2;FILENAME1.CSV

```

Can someone help me with this?