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V3021 There are two ‘if’ statements with identical conditional expressions. The first ‘if’ statement contains method return. This means that the second ‘if’ statement is senseless SkiaEncoder.cs 537

public string EncodeImage(string inputPath, 
                          DateTime dateModified, 
                          string outputPath, 
                          bool autoOrient, 
                          ImageOrientation? orientation, 
                          int quality, 
                          ImageProcessingOptions options, 
                          ImageFormat selectedOutputFormat)
{
  if (string.IsNullOrWhiteSpace(inputPath))
  {
      throw new ArgumentNullException("inputPath");
  }
  if (string.IsNullOrWhiteSpace(inputPath))
  {
      throw new ArgumentNullException("outputPath");
  }
  ....
}

The developer must have cloned the first four lines but forgot to change the name of the variable being checked from inputPath to outputPath. There are several lines further on where outputPath is used without a prior null check, which means an exception may be thrown.

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