System.Tests.AttributeTests.StringArgument_InvalidCodeUnits_FallbackUsed C# (CSharp) Method

        public static void StringArgument_InvalidCodeUnits_FallbackUsed()
        {
            MethodInfo thisMethod = typeof(AttributeTests).GetTypeInfo().GetDeclaredMethod("StringArgument_InvalidCodeUnits_FallbackUsed");
            Assert.NotNull(thisMethod);

            CustomAttributeData cad = thisMethod.CustomAttributes.Where(ca => ca.AttributeType == typeof(StringValueAttribute)).FirstOrDefault();
            Assert.NotNull(cad);

            string stringArg = cad.ConstructorArguments[0].Value as string;
            Assert.NotNull(stringArg);
            Assert.Equal("\uFFFD\uFFFD", stringArg);
        }