MembersMustExist : Member 'System.Type.GetType(System.String, System.Func<System.Reflection.AssemblyName, System.Reflection.Assembly>, System.Func<System.Reflection.Assembly, System.String, System.Boolean, System.Type>)' does not exist in the implementation but it does exist in the contract.
MembersMustExist : Member 'System.Type.GetType(System.String, System.Func<System.Reflection.AssemblyName, System.Reflection.Assembly>, System.Func<System.Reflection.Assembly, System.String, System.Boolean, System.Type>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
MembersMustExist : Member 'System.Type.GetType(System.String, System.Func<System.Reflection.AssemblyName, System.Reflection.Assembly>, System.Func<System.Reflection.Assembly, System.String, System.Boolean, System.Type>, System.Boolean, System.Boolean)' does not exist in the implementation but it does exist in the contract.
MembersMustExist : Member 'System.Type.IsContextful.get()' does not exist in the implementation but it does exist in the contract.
MembersMustExist : Member 'System.Type.IsContextfulImpl()' does not exist in the implementation but it does exist in the contract.
MembersMustExist : Member 'System.Reflection.Assembly.add_ModuleResolve(System.Reflection.ModuleResolveEventHandler)' does not exist in the implementation but it does exist in the contract.
MembersMustExist : Member 'System.Reflection.Assembly.remove_ModuleResolve(System.Reflection.ModuleResolveEventHandler)' does not exist in the implementation but it does exist in the contract.
See dotnet/corefx#12187. These missing APIs were not detected by the tooling before because of the inconsistencies in the mscorlib forwarder in the CoreCLR targeting pack.