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Microsoft SharePoint Blog
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Provider Hosted App (PHA) application errors (TLS errors and 401 errors).

SPDev_Support's avatar
SPDev_Support
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Apr 15, 2021
Note: Please take extreme caution before making any changes in Production. Make sure you test the changes in a test environment first.   Recently due to a spate of updates to various endpoints in...
Updated May 27, 2021
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WestleyH's avatar
WestleyH
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May 19, 2021

It will work fine, but might keep it from using TLS13 in the future when that protocol is introduced or enforced.

Hard-coding the protocols should be avoided.

Since the code is in the global.asax, it isn't as bad since you can edit it and it will re-compile; you could also put the settings in a web.config and that would be a little better.

 

Leaving it up to .NET and the OS is best, then you just make sure the OS has the support installed/enabled, and you are ready to go with no changes to your application.