Purge use of RNGCryptoServiceProvider in examples

[vcsjones]

Summary

The RNGCryptoServiceProvider class is obsolete in .NET. Instead of using this class directly, using RandomNumberGenerator.Create to get the appropriate implementation, which works for all .NETs (including .NET Framework).

The only remaining use of RNGCryptoServiceProvider in examples is documentation for RNGCryptoServiceProvider itself.

Fixes #10329
Fixes #10011
Fixes #10018

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-security, @vcsjones

[learn-build-service-prod]

Learn Build status updates of commit ba66130:

✅ Validation status: passed

File	Status	Preview URL	Details
snippets/cpp/VS_Snippets_CLR_Classic/classic RandomNumberGenerator.GetBytes Example/CPP/source.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR_Classic/classic RandomNumberGenerator.GetNonZeroBytes Example/CPP/source.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR_System/system.Security.Cryptography.RSAOAEPKeyExchangeDeformatter/CPP/rsaencoder.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/Cryptography.PasswordDerivedbytes/cpp/sample.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACRIPEMD160/CPP/hmacripemd160.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACRIPEMD160/CPP/makefile	✅Succeeded
snippets/cpp/VS_Snippets_CLR/HMACSHA256/CPP/hmacsha256.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACSHA256/CPP/makefile	✅Succeeded
snippets/cpp/VS_Snippets_CLR/HMACSHA384/CPP/hmacsha384.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACSHA384/CPP/makefile	✅Succeeded
snippets/cpp/VS_Snippets_CLR/HMACSHA512/CPP/hmacsha512.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACSHA512/CPP/makefile	✅Succeeded
snippets/cpp/VS_Snippets_CLR/rfc28981/CPP/rfc28981.cpp	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/HMACRIPEMD160/Overview/hmacripemd160.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/HMACSHA256/Overview/hmacsha256.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/HMACSHA384/Overview/hmacsha384.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/HMACSHA512/Overview/hmacsha512.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/MACTripleDES/Overview/program.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/PasswordDeriveBytes/Overview/sample.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/RandomNumberGenerator/GetBytes/source.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/RandomNumberGenerator/GetNonZeroBytes/source.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/Rfc2898DeriveBytes/Overview/rfc28981.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/RSAOAEPKeyExchangeDeformatter/Parameters/rsaencoder.cs	✅Succeeded	View
snippets/csharp/VS_Snippets_CFX/samlattribute/cs/source.cs	✅Succeeded	View
snippets/visualbasic/VS_Snippets_CFX/samlattribute/vb/source.vb	✅Succeeded	View

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[gewarren]

@adegeo Why does Snippets 5000 care about this file given that it's configured to ignore .cpp files? See

dotnet-api-docs/.github/workflows/snippets5000.yml

Line 55 in 912ede2

ExtensionsCodeTriggers: .cs;.vb;.fs;.xaml;.razor;.cshtml;.vbhtml;.sln;.csproj;.fsproj;.vbproj;.proj

.

[learn-build-service-prod]

Learn Build status updates of commit ebc217a:

✅ Validation status: passed

File	Status	Preview URL	Details
snippets/cpp/VS_Snippets_CLR_Classic/classic RandomNumberGenerator.GetBytes Example/CPP/source.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR_Classic/classic RandomNumberGenerator.GetNonZeroBytes Example/CPP/source.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR_System/system.Security.Cryptography.RSAOAEPKeyExchangeDeformatter/CPP/rsaencoder.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/Cryptography.PasswordDerivedbytes/cpp/sample.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACRIPEMD160/CPP/hmacripemd160.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACRIPEMD160/CPP/makefile	✅Succeeded
snippets/cpp/VS_Snippets_CLR/HMACSHA256/CPP/hmacsha256.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACSHA256/CPP/makefile	✅Succeeded
snippets/cpp/VS_Snippets_CLR/HMACSHA384/CPP/hmacsha384.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACSHA384/CPP/makefile	✅Succeeded
snippets/cpp/VS_Snippets_CLR/HMACSHA512/CPP/hmacsha512.cpp	✅Succeeded	View
snippets/cpp/VS_Snippets_CLR/HMACSHA512/CPP/makefile	✅Succeeded
snippets/cpp/VS_Snippets_CLR/rfc28981/CPP/rfc28981.cpp	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/HMACRIPEMD160/Overview/hmacripemd160.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/HMACSHA256/Overview/hmacsha256.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/HMACSHA384/Overview/hmacsha384.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/HMACSHA512/Overview/hmacsha512.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/MACTripleDES/Overview/program.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/PasswordDeriveBytes/Overview/sample.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/RandomNumberGenerator/GetBytes/source.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/RandomNumberGenerator/GetNonZeroBytes/source.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/Rfc2898DeriveBytes/Overview/rfc28981.cs	✅Succeeded	View
snippets/csharp/System.Security.Cryptography/RSAOAEPKeyExchangeDeformatter/Parameters/rsaencoder.cs	✅Succeeded	View
snippets/csharp/VS_Snippets_CFX/samlattribute/cs/makefile	✅Succeeded	n/a (file deleted or renamed)
snippets/csharp/VS_Snippets_CFX/samlattribute/cs/Project.csproj	✅Succeeded

This comment lists only the first 25 files in the pull request.
For more details, please refer to the build report.

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