private void ExecuteOperation()
{
//Cria o objeto de operação
OperationFactory factory = new OperationFactory();
var operationObject = factory.CreateFromStringData(op1.Value, op2.Value, chosenOperation);
//calcula
float result = operationObject.C;
//resultado no operando 1
op1.SetFromFloat(result);
//limpa a operaçao
chosenOperation = "";
//limpa operando 2
op2.Clear();
//operando atual no operando 1
currentOperand = op1;
}