The article states:

Create an instance of a default implementation class by using a factory method on the base algorithm class, and refer to the base algorithm class. For example, see the highlighted line of code in the following example:

However, the highlighted line is:

using FileStream myStream = new FileStream("TestData.txt", FileMode.OpenOrCreate);

Which does not refer to cryptography classes, and does not use a factory method to create an instance. Instead, I think the highlighted line should be

using Aes aes = Aes.Create();

Document Details

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• ID: fc59c0ef-fc24-730b-086a-683bb85fca7a
• Version Independent ID: 93212589-e9f6-4bf8-d547-559743e3eb5e
• Content: .NET Cryptography Model
• Content Source: docs/standard/security/cryptography-model.md
• Product: dotnet
• Technology: dotnet-security
• GitHub Login: @IEvangelist
• Microsoft Alias: dapine