What does it mean when a Blazor Client receives a Status 400 from WebApi while calling PostAsJsonAsync?

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A 400 status code indicates that the client's request was malformed or incorrect. In the context of calling PostAsJsonAsync from a Blazor Client, it could mean that the data being sent in the request body is not formatted correctly or is missing required fields. The exact reason for the 400 status code would depend on the specific WebApi being called and its requirements for the incoming data.