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SendGridWe’ve spotted some strange behavior before with ASP.NET Core and JSON serialization/deserialization, and I eventually made it back to trying out some scenarios.
One thing I’ve noticed is the default System.Text.Json settings don’t roundtrip (that is, serialize and deserialize) through the ASP.NET Core 3.1 TestServer (without additional configuration).
The underlying issue is by default there’s a character case mismatch.
One way to make it work is setting the property names case insensitive when deserializing the response:
var responseObj = JsonSerializer.Deserialize<TestObject>(strContent, new JsonSerializerOptions
{
// Required for test to pass, by default
// there's a case mismatch that isn't automatically handled
PropertyNamingPolicy = JsonNamingPolicy.CamelCase
// or
// PropertyNameCaseInsensitive = true
});
Alternatively, we could update the character case to match expectations via an attribute ([JsonPropertyName("StringValue")]) on each property.
A test associated with this post is at https://github.com/kendaleiv/AspNetCoreJsonTests/blob/9c57b5425c8bac5bbb4440f676110e0dfc6fb75d/UnitTest1.cs#L51-L93.
