Is it impossible to establish a secure SSL/TLS channel using HttpClient in C# net versions 4.8?

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No, it is not impossible to establish a secure SSL/TLS channel using HttpClient in C# .NET versions 4.8. In fact, HttpClient supports SSL/TLS by default and can establish secure connections using protocols such as TLS 1.2 and TLS 1.3. However, it is important to properly configure HttpClient to ensure secure communication and avoid vulnerabilities such as weak cipher suites or certificate validation errors. This can be done by specifying appropriate SSL/TLS parameters and certificate validation options.