Partial Type

src/runtime/src/libraries/System.Private.CoreLib/src/System/Buffers/Text/Base64Url/Base64UrlDecoder.cs

src/runtime/src/libraries/System.Private.CoreLib/src/System/Buffers/Text/Base64Url/Base64UrlEncoder.cs

src/runtime/src/libraries/System.Private.CoreLib/src/System/Buffers/Text/Base64Url/Base64UrlValidator.cs