<t>Encoder<br/>
<br/>
public static string Base64Encode(string plainText) <br/>
{<br/>
var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);<br/>
return System.Convert.ToBase64String(plainTextBytes);<br/>
}<br/>
<br/>
```<br/>
<br/>
Décoder<br/>
<br/>
```<br/>
public static string Base64Decode(string base64EncodedData) <br/>
{<br/>
var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData);<br/>
return System.Text.Encoding.UTF8.GetString(base64EncodedBytes);<br/>
}<br/>
<br/>
```</t>
