REFERENCE_SOURCES_FLAGS = -d:FEATURE_PAL,PFX_LEGACY_3_5,FEATURE_NETCORE
LIB_REFS = System
-LIB_MCS_FLAGS = $(REFERENCE_SOURCES_FLAGS) -d:INSIDE_SYSCORE -d:LIBC -unsafe
+LIB_MCS_FLAGS = $(REFERENCE_SOURCES_FLAGS) -d:INSIDE_SYSCORE -d:LIBC -unsafe -nowarn:436
TXT_RESOURCE_STRINGS = ../referencesource/System.Core/System.Core.txt
ifneq (2.1, $(FRAMEWORK_VERSION))