Does anyone know of a (preferably open source) C# library that can be implemented to calculate the overall sentiment of some given text?
Take a look at an open source sentiment analysis engine based on Naive Bayes classification at https://github.com/amrishdeep/Dragon.
http://rapid-i.com/content/view/26/84/
maybe not c# but I guess you can call it from c#, will it does the job for you?
来源：https://stackoverflow.com/questions/494276/c-sharp-sentiment-analysis