[QUIC] HandleWriteStartState should behave similarly to reading

[ManickaP]

The code flow should basically mirror reading code flow, which firstly handles state transitions inside the lock and then check and throw exceptions afterwards.

Source: Code review session

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Issue Details

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The code flow should basically mirror reading code flow, which firstly handles state transitions inside the lock and then check and throw exceptions afterwards.

Author:	ManickaP
Assignees:	-
Labels:	area-System.Threading, untriaged
Milestone:	-

Tagging subscribers to this area: @dotnet/ncl
See info in area-owners.md if you want to be subscribed.

Issue Details

---

The code flow should basically mirror reading code flow, which firstly handles state transitions inside the lock and then check and throw exceptions afterwards.

Author:	ManickaP
Assignees:	-
Labels:	area-System.Net.Quic
Milestone:	-