How can I read a file extension from an XML attribute and show it in datagridview ? 

Here is my XML. For example I want in datagridview to be displayed only the .exe extension.

```
<dir ParentFolder="e:\">
  <file FileName="SQLEXPR_x64_ENU.exe" />
  <file FileName="SQLManagementStudio_x64_ENU (2).exe" />
  <file FileName="wampserver2.5-Apache-2.4.9-Mysql-5.6.17-php5.5.12-64b.exe" />
</dir>

```

I loaded the xml file and i can only display the SQLEXPR\_x64\_ENU.exe in DataGridViewTextBoxColumn for example, but i only need .exe to be displayed.Here is the code

```
      XmlReader xmlFile = XmlReader.Create("directory.xml", new XmlReaderSettings());

      DataSet ds = new DataSet();
      //Read xml to dataset
      ds.ReadXml(xmlFile);
      dataGridView1.DataSource = ds.Tables["dir"]; 
      dataGridView1.DataMember  = "dir_file"; 

```