public  static  double  CalculateTagSize(double  score, double  minScore, double  maxScore, double  minSize, double  maxSize)

 {

     Contract .Requires<ArgumentOutOfRangeException >(minScore < maxScore, 

         "minScore must be smaller than maxScore." );

     Contract .Requires<ArgumentOutOfRangeException >(minSize < maxSize, 

         "minSize must be smaller than maxSize." );

     Contract .Requires<ArgumentOutOfRangeException >(score > minScore && score < maxScore, 

         "score must be greater than minScore and smaller than maxScore." );

     return  minSize + ((maxSize - minSize) * (score - minScore)) / (maxScore - minScore);

 }

 public  static  double  CalculateTagSize(double  score, double  minScore, double  maxScore, double  minSize, double  maxSize)

 {

     if  (!(minScore < maxScore))

         throw  new  ArgumentOutOfRangeException ("minScore must be smaller than maxScore." );

     if  (!(minSize < maxSize))

         throw  new  ArgumentOutOfRangeException ("minSize must be smaller than maxSize." );

     if  (score < minScore || score > maxScore)

         throw  new  ArgumentOutOfRangeException ("score must be greater than minScore and smaller than maxScore." );

     return  minSize + ((maxSize - minSize) * (score - minScore)) / (maxScore - minScore);

 }