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// Copyright (c) 2007 James Newton-King
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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using Newtonsoft.Json.Tests.TestObjects;
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using NUnit.Framework;
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using Microsoft.VisualStudio.TestPlatform.UnitTestFramework;
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using TestFixture = Microsoft.VisualStudio.TestPlatform.UnitTestFramework.TestClassAttribute;
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using Test = Microsoft.VisualStudio.TestPlatform.UnitTestFramework.TestMethodAttribute;
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using Newtonsoft.Json.Converters;
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using Newtonsoft.Json.Utilities;
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using System.Globalization;
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namespace Newtonsoft.Json.Tests.Converters
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public class IsoDateTimeConverterTests : TestFixtureBase
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public void PropertiesShouldBeSet()
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IsoDateTimeConverter converter = new IsoDateTimeConverter();
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Assert.AreEqual(CultureInfo.CurrentCulture, converter.Culture);
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Assert.AreEqual(string.Empty, converter.DateTimeFormat);
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Assert.AreEqual(DateTimeStyles.RoundtripKind, converter.DateTimeStyles);
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converter = new IsoDateTimeConverter()
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Culture = CultureInfo.InvariantCulture,
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DateTimeStyles = DateTimeStyles.None
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Assert.AreEqual(CultureInfo.InvariantCulture, converter.Culture);
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Assert.AreEqual("F", converter.DateTimeFormat);
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Assert.AreEqual(DateTimeStyles.None, converter.DateTimeStyles);
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public void SerializeDateTime()
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IsoDateTimeConverter converter = new IsoDateTimeConverter();
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DateTime d = new DateTime(2000, 12, 15, 22, 11, 3, 55, DateTimeKind.Utc);
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result = JsonConvert.SerializeObject(d, converter);
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Assert.AreEqual(@"""2000-12-15T22:11:03.055Z""", result);
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Assert.AreEqual(d, JsonConvert.DeserializeObject<DateTime>(result, converter));
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d = new DateTime(2000, 12, 15, 22, 11, 3, 55, DateTimeKind.Local);
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result = JsonConvert.SerializeObject(d, converter);
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Assert.AreEqual(@"""2000-12-15T22:11:03.055" + d.GetUtcOffsetText() + @"""", result);
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public void SerializeFormattedDateTimeInvariantCulture()
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IsoDateTimeConverter converter = new IsoDateTimeConverter() { DateTimeFormat = "F", Culture = CultureInfo.InvariantCulture };
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DateTime d = new DateTime(2000, 12, 15, 22, 11, 3, 0, DateTimeKind.Utc);
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result = JsonConvert.SerializeObject(d, converter);
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Assert.AreEqual(@"""Friday, 15 December 2000 22:11:03""", result);
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Assert.AreEqual(d, JsonConvert.DeserializeObject<DateTime>(result, converter));
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d = new DateTime(2000, 12, 15, 22, 11, 3, 0, DateTimeKind.Local);
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result = JsonConvert.SerializeObject(d, converter);
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Assert.AreEqual(@"""Friday, 15 December 2000 22:11:03""", result);
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public void SerializeCustomFormattedDateTime()
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IsoDateTimeConverter converter = new IsoDateTimeConverter
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DateTimeFormat = "dd/MM/yyyy",
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Culture = CultureInfo.InvariantCulture
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string json = @"""09/12/2006""";
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DateTime d = JsonConvert.DeserializeObject<DateTime>(json, converter);
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Assert.AreEqual(9, d.Day);
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Assert.AreEqual(12, d.Month);
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Assert.AreEqual(2006, d.Year);
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#if !SILVERLIGHT && !NETFX_CORE
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public void SerializeFormattedDateTimeNewZealandCulture()
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IsoDateTimeConverter converter = new IsoDateTimeConverter() { DateTimeFormat = "F", Culture = CultureInfo.GetCultureInfo("en-NZ") };
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DateTime d = new DateTime(2000, 12, 15, 22, 11, 3, 0, DateTimeKind.Utc);
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result = JsonConvert.SerializeObject(d, converter);
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Assert.AreEqual(@"""Friday, 15 December 2000 10:11:03 p.m.""", result);
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Assert.AreEqual(d, JsonConvert.DeserializeObject<DateTime>(result, converter));
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d = new DateTime(2000, 12, 15, 22, 11, 3, 0, DateTimeKind.Local);
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result = JsonConvert.SerializeObject(d, converter);
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Assert.AreEqual(@"""Friday, 15 December 2000 10:11:03 p.m.""", result);
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public void SerializeDateTimeCulture()
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IsoDateTimeConverter converter = new IsoDateTimeConverter() { Culture = CultureInfo.GetCultureInfo("en-NZ") };
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string json = @"""09/12/2006""";
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DateTime d = JsonConvert.DeserializeObject<DateTime>(json, converter);
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Assert.AreEqual(9, d.Day);
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Assert.AreEqual(12, d.Month);
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Assert.AreEqual(2006, d.Year);
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#if !PocketPC && !NET20
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public void SerializeDateTimeOffset()
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IsoDateTimeConverter converter = new IsoDateTimeConverter();
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DateTimeOffset d = new DateTimeOffset(2000, 12, 15, 22, 11, 3, 55, TimeSpan.Zero);
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result = JsonConvert.SerializeObject(d, converter);
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Assert.AreEqual(@"""2000-12-15T22:11:03.055+00:00""", result);
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Assert.AreEqual(d, JsonConvert.DeserializeObject<DateTimeOffset>(result, converter));
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public void SerializeUTC()
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DateTimeTestClass c = new DateTimeTestClass();
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c.DateTimeField = new DateTime(2008, 12, 12, 12, 12, 12, 0, DateTimeKind.Utc).ToLocalTime();
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c.DateTimeOffsetField = new DateTime(2008, 12, 12, 12, 12, 12, 0, DateTimeKind.Utc).ToLocalTime();
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c.PostField = "Post";
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string json = JsonConvert.SerializeObject(c, new IsoDateTimeConverter() { DateTimeStyles = DateTimeStyles.AssumeUniversal });
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Assert.AreEqual(@"{""PreField"":""Pre"",""DateTimeField"":""2008-12-12T12:12:12Z"",""DateTimeOffsetField"":""2008-12-12T12:12:12+00:00"",""PostField"":""Post""}", json);
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//test the other edge case too
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c.DateTimeField = new DateTime(2008, 1, 1, 1, 1, 1, 0, DateTimeKind.Utc).ToLocalTime();
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c.DateTimeOffsetField = new DateTime(2008, 1, 1, 1, 1, 1, 0, DateTimeKind.Utc).ToLocalTime();
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c.PostField = "Post";
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json = JsonConvert.SerializeObject(c, new IsoDateTimeConverter() { DateTimeStyles = DateTimeStyles.AssumeUniversal });
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Assert.AreEqual(@"{""PreField"":""Pre"",""DateTimeField"":""2008-01-01T01:01:01Z"",""DateTimeOffsetField"":""2008-01-01T01:01:01+00:00"",""PostField"":""Post""}", json);
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public void NullableSerializeUTC()
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NullableDateTimeTestClass c = new NullableDateTimeTestClass();
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c.DateTimeField = new DateTime(2008, 12, 12, 12, 12, 12, 0, DateTimeKind.Utc).ToLocalTime();
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c.DateTimeOffsetField = new DateTime(2008, 12, 12, 12, 12, 12, 0, DateTimeKind.Utc).ToLocalTime();
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c.PostField = "Post";
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string json = JsonConvert.SerializeObject(c, new IsoDateTimeConverter() { DateTimeStyles = DateTimeStyles.AssumeUniversal });
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Assert.AreEqual(@"{""PreField"":""Pre"",""DateTimeField"":""2008-12-12T12:12:12Z"",""DateTimeOffsetField"":""2008-12-12T12:12:12+00:00"",""PostField"":""Post""}", json);
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//test the other edge case too
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c.DateTimeField = null;
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c.DateTimeOffsetField = null;
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c.PostField = "Post";
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json = JsonConvert.SerializeObject(c, new IsoDateTimeConverter() { DateTimeStyles = DateTimeStyles.AssumeUniversal });
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Assert.AreEqual(@"{""PreField"":""Pre"",""DateTimeField"":null,""DateTimeOffsetField"":null,""PostField"":""Post""}", json);
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public void NullableDeserializeEmptyString()
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string json = @"{""DateTimeField"":""""}";
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NullableDateTimeTestClass c = JsonConvert.DeserializeObject<NullableDateTimeTestClass>(json,
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new JsonSerializerSettings { Converters = new [] {new IsoDateTimeConverter()}});
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Assert.AreEqual(null, c.DateTimeField);
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public void DeserializeNullToNonNullable()
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ExceptionAssert.Throws<JsonSerializationException>("Cannot convert null value to System.DateTime. Path 'DateTimeField', line 1, position 38.",
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DateTimeTestClass c2 =
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JsonConvert.DeserializeObject<DateTimeTestClass>(@"{""PreField"":""Pre"",""DateTimeField"":null,""DateTimeOffsetField"":null,""PostField"":""Post""}", new IsoDateTimeConverter() { DateTimeStyles = DateTimeStyles.AssumeUniversal });
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public void SerializeShouldChangeNonUTCDates()
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DateTime localDateTime = new DateTime(2008, 1, 1, 1, 1, 1, 0, DateTimeKind.Local);
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DateTimeTestClass c = new DateTimeTestClass();
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c.DateTimeField = localDateTime;
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c.PostField = "Post";
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string json = JsonConvert.SerializeObject(c, new IsoDateTimeConverter() { DateTimeStyles = DateTimeStyles.AssumeUniversal }); //note that this fails without the Utc converter...
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c.DateTimeField = new DateTime(2008, 1, 1, 1, 1, 1, 0, DateTimeKind.Utc);
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string json2 = JsonConvert.SerializeObject(c, new IsoDateTimeConverter() { DateTimeStyles = DateTimeStyles.AssumeUniversal });
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TimeSpan offset = localDateTime.GetUtcOffset();
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// if the current timezone is utc then local already equals utc
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if (offset == TimeSpan.Zero)
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Assert.AreEqual(json, json2);
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Assert.AreNotEqual(json, json2);
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public void BlogCodeSample()
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Person p = new Person
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BirthDate = new DateTime(1980, 3, 8),
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LastModified = new DateTime(2009, 4, 12, 20, 44, 55),
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string jsonText = JsonConvert.SerializeObject(p, new IsoDateTimeConverter());
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// "BirthDate": "1980-03-08T00:00:00",
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// "LastModified": "2009-04-12T20:44:55"
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Console.WriteLine(jsonText);
b'\\ No newline at end of file'