C# Online Compiler | .NET Fiddle

<no name> by Anonymous

	using System;
using System.Globalization;
using Humanizer;
					
public class Program
{
	public static void Main()
	{
		var uiCultures = new [] { "nl-BE", "fr-BE", "en-BE", "de-DE", "es-ES" };
		var listOfCultures = CultureInfo.GetCultures(System.Globalization.CultureTypes.SpecificCultures);
		
		foreach(var uiCulture in uiCultures) {
			var cultureToSet = new CultureInfo(uiCulture);
			CultureInfo.DefaultThreadCurrentCulture = cultureToSet;
			CultureInfo.DefaultThreadCurrentUICulture = cultureToSet;
			Console.WriteLine($"Setting culture {cultureToSet.Name}");
			Console.WriteLine("------------------------------------");
			foreach(var culture in listOfCultures){
				int number = 75;
				var writtenNumber = number.ToWords(culture);
				var name = culture.Name;
				var displayName = culture.DisplayName;
				var englishName = culture.EnglishName;
				Console.WriteLine($"{culture.Name}: {displayName}-{culture.EnglishName} - {writtenNumber}");
		 	}
			Console.WriteLine($"Done setting culture {cultureToSet.Name}");
			Console.WriteLine("------------------------------------");
		}
	}
}

 
    using System;
using System.Globalization;
using Humanizer;
                    
public class Program
{
    public static void Main()
    {
        var uiCultures = new [] { "nl-BE", "fr-BE", "en-BE", "de-DE", "es-ES" };
        var listOfCultures = CultureInfo.GetCultures(System.Globalization.CultureTypes.SpecificCultures);
        
        foreach(var uiCulture in uiCultures) {
            var cultureToSet = new CultureInfo(uiCulture);
            CultureInfo.DefaultThreadCurrentCulture = cultureToSet;
            CultureInfo.DefaultThreadCurrentUICulture = cultureToSet;
            Console.WriteLine($"Setting culture {cultureToSet.Name}");
            Console.WriteLine("------------------------------------");
            foreach(var culture in listOfCultures){
                int number = 75;
                var writtenNumber = number.ToWords(culture);
                var name = culture.Name;
                var displayName = culture.DisplayName;
                var englishName = culture.EnglishName;
                Console.WriteLine($"{culture.Name}: {displayName}-{culture.EnglishName} - {writtenNumber}");
            }
            Console.WriteLine($"Done setting culture {cultureToSet.Name}");
            Console.WriteLine("------------------------------------");
        }
    }
}

Environment version: .NET 9.0.0 (9.0.0)
System.Text.Json version: System.Text.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51

Correctly threw exception:
ProblemDetailsException: Invalid DateTime. Please use RoundTripKind (MM-DD-YYYY) - https://docs.microsoft.com/en-us/dotnet/standard/base-types/how-to-round-trip-date-and-time-values
---> System.Text.Json.JsonException: The JSON value could not be converted to System.DateTime. Path: $.MyDateTime | LineNumber: 0 | BytePositionInLine: 20.
---> ProblemDetailsException: Invalid DateTime. Please use RoundTripKind (MM-DD-YYYY) - https://docs.microsoft.com/en-us/dotnet/standard/base-types/how-to-round-trip-date-and-time-values
   --- End of inner exception stack trace ---
   at DateTimeConverterUsingDateTimeParse.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value, Boolean& isPopulatedValue)
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value, Boolean& isPopulatedValue)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, T& value, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.Deserialize(Utf8JsonReader& reader, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 utf8Json, JsonTypeInfo`1 jsonTypeInfo, Nullable`1 actualByteCount)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 json, JsonTypeInfo`1 jsonTypeInfo)
   at JsonExtensions.Deserialize[T](String json, JsonSerializerOptions options)
   --- End of inner exception stack trace ---
   at JsonExtensions.Deserialize[T](String json, JsonSerializerOptions options)
   at TestClass.InnerTest()
   at TestClass.<>c.<Test>b__0_0()
   at NUnit.Framework.Assert.Throws(IResolveConstraint expression, TestDelegate code, String message, Object[] args)

Cached Result
Last Run:	4:15:17 am
Compile:	0.029s
Execute:	0.14s
Memory:	15.29Mb
CPU:	0.169s

View IL Code