> For the complete documentation index, see [llms.txt](https://revdebug.gitbook.io/revdebug/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://revdebug.gitbook.io/revdebug/supported-langauges/c/data-masking.md).

# Data masking

Data masking capabilities of RevDeBug for C# projects and how to use them.

### Excluding specified code from RevDeBug recordings

You can exclude parts of the source code from RevDeBug recording by enclosing it with

"`NoTimeTravel`" region. eg:

```csharp
#region NoTimeTravel
 public static String MethodExcluded(FinallyClauseSyntax finallyClause)
        {
            //...
            return retValue
        }
#endregion
```

### Excluding variables' values from RevDeBug recordings

You can specify variable names and/or regular expressions matching variable names that RevDeBug will ignore when recording code execution.

This is done in a configuration file with "`.rdbbuildignore`" extension (eg. `project_name.rdbbuildignore`). 

The file needs to be included in the project as "`AdditionalFiles`" type (in the properties window of the file inside Visual Studio - it will default to "`Content`" or "`None`" and need to be changed to  "`AdditionalFiles`").

The default content if the file is not present contains following entries:

```
password
pwd
cardNumber
secretkey

```

After the next full rebuild of the project code execution recordings will exclude values of variables that have their names match the list.