add code fix for wildcard _ in pattern match for fs43 on |-> #1820

Job	Run time
Build on windows-latest for repo global.json	6m 57s
Build on windows-latest for 6.0 stable	7m 47s
Build on windows-latest for 7.0 preview	7m 48s
Build on macos-latest for repo global.json	5m 54s
Build on macos-latest for 6.0 stable	6m 55s
Build on macos-latest for 7.0 preview	7m 14s
Build on ubuntu-latest for repo global.json	5m 50s
Build on ubuntu-latest for 6.0 stable	6m 16s
Build on ubuntu-latest for 7.0 preview	6m 24s
	1h 1m 5s

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