System.Runtime.Serialization.CodeGenerator.Br C# (CSharp) Method

        internal void Br(Label label)
        {
            if (_codeGenTrace != CodeGenTrace.None)
                EmitSourceInstruction("Br " + label.GetHashCode());
            _ilGen.Emit(OpCodes.Br, label);
        }

            private LocalBuilder UnwrapNullableObject(LocalBuilder memberValue)// Leaves !HasValue on stack
            {
                Type  memberType = memberValue.LocalType;
                Label onNull     = _ilg.DefineLabel();
                Label end        = _ilg.DefineLabel();

                _ilg.Load(memberValue);
                while (memberType.IsGenericType && memberType.GetGenericTypeDefinition() == Globals.TypeOfNullable)
                {
                    Type innerType = memberType.GetGenericArguments()[0];
                    _ilg.Dup();
                    _ilg.Call(XmlFormatGeneratorStatics.GetHasValueMethod.MakeGenericMethod(innerType));
                    _ilg.Brfalse(onNull);
                    _ilg.Call(XmlFormatGeneratorStatics.GetNullableValueMethod.MakeGenericMethod(innerType));
                    memberType = innerType;
                }
                memberValue = _ilg.DeclareLocal(memberType, "nullableUnwrappedMemberValue");
                _ilg.Stloc(memberValue);
                _ilg.Load(false); //isNull
                _ilg.Br(end);
                _ilg.MarkLabel(onNull);
                _ilg.Pop();
                _ilg.Call(XmlFormatGeneratorStatics.GetDefaultValueMethod.MakeGenericMethod(memberType));
                _ilg.Stloc(memberValue);
                _ilg.Load(true);//isNull
                _ilg.MarkLabel(end);
                return(memberValue);
            }