Assembly name missing from this page

This page is missing the name of the assembly that implements this namespace. It is traditional for .NET namespace documentation to identify the name of the assembly that implements the namespace. This allows customers to add the appropriate assembly reference to their projects after adding a 'using' directive to their code.

---
#### Document Details

⚠ *Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.*

* ID: 020713ad-8570-8c1b-b723-8d7f89a26192
* Version Independent ID: c52f8b2c-76eb-0083-6640-24c9e9673e90
* Content: [System.Security.Cryptography.Xml Namespace](https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.xml?view=netframework-4.7.2)
* Content Source: [xml/ns-System.Security.Cryptography.Xml.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/ns-System.Security.Cryptography.Xml.xml)
* Product: **dotnet-api**
* GitHub Login: @mairaw
* Microsoft Alias: **mairaw**