Enum RegistryValueOptions Path C++ Link Microsoft.Win32.RegistryValueOptions, mscorlib underlying int32 mscorlib.dll Values 2 NameValueHex None00x00DoNotExpandEnvironmentNames10x01 Used by 1types with a member, parameter or interface of this type RegistryKey // Microsoft.Win32.RegistryValueOptions, mscorlib enum class RegistryValueOptions : int32 { None = 0, DoNotExpandEnvironmentNames = 1, };