ThrowIfMismatchedPublisher.cs

public class ThrowIfMismatchedPublisher : IResultPublisher
{
  public Task Publish<T, TClean>(Result<T, TClean> result)
  {
    if (result.Mismatched)
    {
      var sb = new StringBuilder();
      sb.AppendLine($"{result.ExperimentName} had mismatched results: ");
        
      foreach (var observation in result.MismatchedObservations)
      {
        sb.AppendLine($"Value: {observation.Value}");
      }
        
      throw new InvalidOperationException(sb.ToString());
    }
      
    return Task.CompletedTask;
  }
}