.NET Core API endpoint model validation

Example of simple method in an API controller for showing invalid posted model state.

public ActionResult<MyModel> Create([FromBody] MyModel model)
    return myBusiness.Create(model);

private void ValidateIncomingModel()
    if (!ControllerContext.ModelState.IsValid)
        var errors = ControllerContext.ModelState.Keys
              .SelectMany(key => ControllerContext.ModelState[key].Errors
              .Select(x => key + ": " + x.ErrorMessage));
        var message = string.Join("\n", errors);
        throw new Exception($"Not valid incoming model\n {message}");


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