# Resolving FileNotFoundException for System.Text.Encoding.CodePages in RadWordsProcessing
## Environment
| Version | Product | Author |
| ---------- | ------------------ | ------------------------------------------------------------------------------- |
| 2024.2.426 | RadWordsProcessing | [Desislava Yordanova](https://www.telerik.com/blogs/author/desislava-yordanova) |
## Description
When you use [RadWordsProcessing](https://www.telerik.com/document-processing-libraries/documentation/libraries/radwordsprocessing/overview) in a WPF/WinForms project that targets .NET 6.0, a `System.IO.FileNotFoundException` error occurs. The error states that the file for assembly `System.Text.Encoding.CodePages, Version=7.0.0.0` cannot be found. This issue arises when you use the `Telerik.Windows.Documents.Flow.FormatProviders.Html.HtmlFormatProvider`.
## Solution
To resolve the `FileNotFoundException` for `System.Text.Encoding.CodePages` in a .NET 6.0 project that uses RadWordsProcessing, follow these steps:
1. Right-click your project and edit the `.csproj` file.
2. Add the `PackageReference` entry for `System.Text.Encoding.CodePages` and a `FunctionsPreservedDependencies` entry for it:
```xml
```
These entries include the required package references in your project and resolve the `FileNotFoundException`.
> note Ensure that your project targets .NET 6.0 and that all NuGet package versions are compatible with your project setup.
## See Also
* [RadWordsProcessing](https://www.telerik.com/document-processing-libraries/documentation/libraries/radwordsprocessing/overview)