don't double deserialize quoted csv fields

Author: mythz

src/ServiceStack.Text/CsvReader.cs

@@ -71,7 +71,7 @@ public static List<string> ParseFields(string line, Func<string,string> parseFn)
             while (++i <= len)
             {
                 var value = EatValue(line, ref i);
-                to.Add(parseFn != null ? parseFn(value.FromCsvField()) : value.FromCsvField());
+                to.Add(parseFn != null ? parseFn(value) : value);
             }
 
             return to;

tests/ServiceStack.Text.Tests/CsvSerializerTests.cs

@@ -377,6 +377,20 @@ public void Can_serialize_single_StringDictionary_or_StringKvps()
             Assert.That(kvps.ToCsv().NormalizeNewLines(), Is.EqualTo("Id,CustomerId\n1,ALFKI").Or.EqualTo("CustomerId,Id\nALFKI,1"));
         }
 
+        [Test]
+        public void Can_serialize_fields_with_double_quotes()
+        {
+            var person = new Person { Id = 1, Name = "\"Mr. Lee\"" };
+            Assert.That(person.ToCsv().NormalizeNewLines(), Is.EqualTo("Id,Name\n1,\"\"\"Mr. Lee\"\"\""));
+            var fromCsv = person.ToCsv().FromCsv<Person>();
+            Assert.That(fromCsv, Is.EqualTo(person));
+            
+            person = new Person { Id = 1, Name = "\"Anon\" Review" };
+            Assert.That(person.ToCsv().NormalizeNewLines(), Is.EqualTo("Id,Name\n1,\"\"\"Anon\"\" Review\""));
+            fromCsv = person.ToCsv().FromCsv<Person>();
+            Assert.That(fromCsv, Is.EqualTo(person));
+        }
+
         [Test]
         public void serialize_Category()
         {