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.NET40兼容,默认框架越新集成的TLS协议版本就越高,最新最安全的是TLS1.3版本。
- [SecurityCritical]
- [SecuritySafeCritical]
- private static void InitialSecurityProtocol()
- {
- try
- {
- ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3
- | SecurityProtocolType.Tls
- | (SecurityProtocolType)0x300 // Tls11
- | (SecurityProtocolType)0xC00 // Tls12
- | (SecurityProtocolType)0x3000; // Tls13
- }
- catch (Exception)
- {
- try
- {
- ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3
- | SecurityProtocolType.Tls
- | (SecurityProtocolType)0x300 // Tls11
- | (SecurityProtocolType)0xC00; // Tls12
- }
- catch (Exception)
- {
- try
- {
- ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3
- | SecurityProtocolType.Tls
- | (SecurityProtocolType)0x300; // Tls11
- }
- catch (Exception)
- {
- try
- {
- ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3
- | SecurityProtocolType.Tls;
- }
- catch (Exception) { }
- }
- }
- }
- }

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