Error      2      Argument 1: cannot convert from 'void' to 'string'

Posted on 2014-04-15
Last Modified: 2014-04-20
I have the following class and when I call the following method Console.WriteLine(dn.TotalDonation()); I get this error. Error      2      Argument 1: cannot convert from 'void' to 'string'      

Is it possible that I have declared my totalDonation method not correctly?
 public void TotalDonation() {
            TotalDonationLBS = DogFoodLBS + CatFoodLBS;

Here is my total code.
class Donations
        private int DogFoodLBS { get; set; }
        private int CatFoodLBS { get; set; }
        public int TotalDonationLBS { get; set; }

        private int CashDonation { get; set; }

        public Donations(int donationdog, int donationcat, int cashdonation) {
            DogFoodLBS = donationdog;
            CatFoodLBS = donationcat;
            CashDonation = cashdonation;

        public void TotalDonation() {
            TotalDonationLBS = DogFoodLBS + CatFoodLBS;

        public int _TotalDonation {
            get { return TotalDonationLBS; }
        public int _DogFoodD {
            get { return DogFoodLBS; }
            set { DogFoodLBS = value; }
        public int _CatFoodD {
            get { return CatFoodLBS; }
            set { CatFoodLBS = value; }

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static void Main(string[] args)
        Donations dn = new Donations (10,4,10);


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Question by:yguyon28
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LVL 52

Expert Comment

by:Carl Tawn
ID: 40002462
Based on your class definition you should be doing:
Donations dn = new Donations(10,4,10);
int totalDonation = dn._TotalDonation;


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LVL 63

Expert Comment

by:Fernando Soto
ID: 40002469
Hi yguyon28;

The way the function TotalDonation is written it does not return a value. So when you execute the Console.WriteLine that it is expecting it to return the TotalDonation but that function does not return anything.

If you want to use TotalDonation in that way it must return a value something like this:

public int TotalDonation() 
    TotalDonationLBS = DogFoodLBS + CatFoodLBS;
    return TotalDonationLBS;

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Or create another function to do the same.

Accepted Solution

repu1sion earned 500 total points
ID: 40002480
You need to declare TotalDonation() function as one returning "string" not "void".
And after that modify it a little to return real string value:

public string TotalDonation() {
            TotalDonationLBS = DogFoodLBS + CatFoodLBS;
             return TotalDonationLBS.ToString()

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