如何消除“使用未分配的局部变量”的错误

Question

Hie i was programming c# and I am having issue getting error that use of unassigned variable where I have already declared the variable. Please help. I have even done building solution in visual studio 2010.

    public decimal FinishCost 
     {
        get {
            decimal fnCost;

            if (exteriorFinishChosen == ExteriorFinish.None) 
            {
                fnCost = Finish.None;
            }

            else if (exteriorFinishChosen == ExteriorFinish.Standard)
            {
                fnCost = Finish.Standard;
            }
            else if (exteriorFinishChosen == ExteriorFinish.Pearlized)
            {
                fnCost = Finish.Pearlized;
            }
            else if (exteriorFinishChosen == ExteriorFinish.Custom)
            {
                fnCost = Finish.Custom;
            }
            return fnCost;
        }
    }

Answer 1

You need to give fnCost an initial value, even if that value is NULL or 0 :

public decimal FinishCost 
{
    get 
    {
        decimal fnCost = 0;

        if (exteriorFinishChosen == ExteriorFinish.None) 
        {
            fnCost = Finish.None;
        }

        else if (exteriorFinishChosen == ExteriorFinish.Standard)
        {
            fnCost = Finish.Standard;
        }
        else if (exteriorFinishChosen == ExteriorFinish.Pearlized)
        {
            fnCost = Finish.Pearlized;
        }
        else if (exteriorFinishChosen == ExteriorFinish.Custom)
        {
            fnCost = Finish.Custom;
        }
        return fnCost;
    }
}