Low~Fat Black Bean and Corn Salad

2 tbls lime juice
1/2 tbls vegetable oil
1 tsp brown sugar
1  15 oz. can black beans, rinsed and drained
1 can of whole corn, drained
3 tbls fresh cilantro, chopped fine
1 tbls soy sauce
1 tsp garlic powder

Mix the cilantro, corn and beans in a large bowl.  Mix the remaining ingredients and pour over the corn and bean mixture.  Refrigerate for one hour.