What is wrong when a "no suitable method found to override" error is thrown back?

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I am having a problem with my code. I created a parent class and overridden it with a child class but it says there is not suitable method to override and I do not understand why this is happening. I looked on the internet but to no avail.

My code for the parent class is:

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Wood_Dylan
{
   abstract class StudentClass
    {
        //Create private backing variables for properties 

        
        //creating properties
        public decimal TotalTuition { get; set; }
        public int Hours { get; set; }
        public decimal BaseRate { get; set; }
        public decimal GraduateFee { get; set; }

        //Method to calculate graduate tuition
        public virtual decimal CalcTuition(int intCreditHours, decimal decBaseRate, decimal decGraduateFee, int intExcessCredits, decimal decExcessCreditsPercentage)
        {
            //declare variables
            Hours = intCreditHours;
            BaseRate = decBaseRate;
            GraduateFee = decGraduateFee;

            TotalTuition = (Hours * BaseRate) + GraduateFee;

            return TotalTuition; 
        }
        


    }
}

The code for the child class is:

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace Wood_Dylan
{
    class UndergraduateClass : StudentClass
    {

        //Create properties that are not in parent class
        public int ExcessCredits { get; set; }
        public decimal ExcessCreditsPercentage { get; set; }
        public decimal RegularTuition { get; set; }
        public decimal ExcessCreditTuition { get; set; }

       
        //Create method to calculate undergraduate tuition
        
        public override decimal CalcTuition(int intExcessCredits, decimal decExcessCreditsPercentage)
        {

           //populate properties not in Parent (student) class
            ExcessCredits = intExcessCredits;
            ExcessCreditsPercentage = decExcessCreditsPercentage;

            //calculate regular tuition
            RegularTuition = Hours * BaseRate;

            //Calc excess credit tuition
            ExcessCreditTuition = ExcessCredits * ExcessCreditsPercentage;

            //Calulate Total Tuition
            TotalTuition = RegularTuition + ExcessCreditTuition;

            return TotalTuition; 

        }

    }
}

Posted 2-Oct-15 6:59am

Member 12028657

Updated 2-Oct-15 7:21am

Wendelius

v2

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2 solutions

Solution 2

To override a method you must have method signature same.
In your base class you have method "CalcTuition" having 5 input parameters.

public virtual decimal CalcTuition(int intCreditHours, decimal decBaseRate, decimal decGraduateFee, int intExcessCredits, decimal decExcessCreditsPercentage)

While in your child class you have method "CalcTuition" having 2 input parameters.

public override decimal CalcTuition(int intExcessCredits, decimal decExcessCreditsPercentage)

To override you should have method signature same ie. return type and number/type of parameter will be same.

Posted 2-Oct-15 7:33am

PANKAJMAURYA

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Wendelius · Accepted Answer · 2015-10-02T07:23:00

The parameters in the derived class are different from the method in the abstract class.

Since the definition in the base class is

C#

public virtual decimal CalcTuition(int intCreditHours, decimal decBaseRate, decimal decGraduateFee, int intExcessCredits, decimal decExcessCreditsPercentage)
{

Instead of the following

C#

public override decimal CalcTuition(int intExcessCredits, decimal decExcessCreditsPercentage)
{

try

C#

public override decimal CalcTuition(int intCreditHours, decimal decBaseRate, decimal decGraduateFee, int intExcessCredits, decimal decExcessCreditsPercentage) 
{