Remove frameworks older than net461 #2138
Description
DiagnosticSource 6.0 only supports net461 and above. (i.e it drops net452,net46 support, few months before they are officially going unsupported - https://devblogs.microsoft.com/dotnet/net-framework-4-5-2-4-6-4-6-1-will-reach-end-of-support-on-april-26-2022/) Since the API/SDK/Exporters depend on DiagnosticSource , they can now only support net461 and above.
Proposing to drop support for NET452, NET46 in the next release (1.2.0). What this means is, when we release the next minor version (1.2.0) in Nov 2021, we'll be cutting support for some frameworks (net452, net46 specifically). This might be considered a breaking-change, and warrant a major version bump.
However, I think we can (and we should) do minor version bump only, considering NET452/46 support is dropped by DS (which we have hard dependency on), and Net452/net46 will be EOL within 4 months of our planned 1.2 release.
@open-telemetry/dotnet-approvers @open-telemetry/dotnet-maintainers Please share your concerns if any with this. Otherwise, please mark approval by commenting to the issue.