using System;

using System.Collections.Generic;

using System.Text.Json;

using System.Text.Json.Serialization;

public class JsonLdContext

{

    [JsonExtensionData]

    public IDictionary<string, JsonElement> AdditionalData { get; set; }

}

​

public class JsonLdDoc

{

    [JsonPropertyName("@context")]

    public JsonLdContext Context { get; set; }

​

    [JsonExtensionData]

    public IDictionary<string, JsonElement> AdditionalData { get; set; }

}

​

public class Program

{

    //Parsing this to JsonLdContext works since @context is a complex object.

    private const string JsonLdTestDataThatWorks = @"{

            ""@context"": { ""something"": ""https://www.w3.org/ns/did/v1"" },

            ""something"": ""something""

        }";

​

    //Parsing this to JsonLdContext fails since @context here is simple attribute.

    private const string JsonLdTestDataThatFails = @"{

            ""@context"": ""https://www.w3.org/ns/did/v1"",

            ""something"": ""something""                    

        }";

    //Parsing this to JsonLdContext fails since @context here is an array of strings.

    private const string JsonLdTestDataThatFails2 = @"{

            ""@context"": [ ""https://www.w3.org/ns/did/v1"", ""https://www.w3.org/ns/did/v1"" ],

            ""something"": ""something""                    

        }";

    public static void Main()

    {

        var options = new JsonSerializerOptions();

        try

        {

            var successDoc = JsonSerializer.Deserialize<JsonLdDoc>(JsonLdTestDataThatWorks, options);

        }

        catch(Exception ex)

        {

            Console.WriteLine($"Failed to parse {nameof(JsonLdTestDataThatWorks)} due to {ex}");

        }

        try

        {

            var failureDoc = JsonSerializer.Deserialize<JsonLdDoc>(JsonLdTestDataThatFails, options);

        }

        catch(Exception ex)

        {

            Console.WriteLine($"Failed to parse {nameof(JsonLdTestDataThatFails)} due to {ex}");

        }

        try

        {

            var failureDoc = JsonSerializer.Deserialize<JsonLdDoc>(JsonLdTestDataThatFails2, options);

        }

        catch(Exception ex)

        {

            Console.WriteLine($"Failed to parse {nameof(JsonLdTestDataThatFails2)} due to {ex}");

        }

    }

}