C# Override Keyword - Tutlane

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In c#, the override keyword is used to override a base class virtual members such as properties, methods, etc., in the derived class to modify it based on our requirements.

 

Following is a simple example of defining a method with an override keyword in c# programming language.

 

// Base Class public class Users {    public virtual void GetInfo()    {       Console.WriteLine("Base Class");    } } // Derived Class public class Details: Users {    public override void GetInfo()    {       Console.WriteLine("Derived Class");    } }

If you observe the above code snippet, we defined a GetInfo method with a virtual keyword in the base class (Users). The GetInfo method can be overridden by any derived class that inherits properties from the base class using the override keyword.

 

In c#, we cannot override non-virtual or static methods. If you want to override a method, you need to define it with a virtual keyword.

 

To override a base class method in the derived class, both the override and virtual methods must have the same signatures and access modifiers.

 

In c#, we should not use static, new, or virtual modifiers to modify an override method. The overriding property declaration must specify the same access modifier, type, and name as inherited property.

C# Override Keyword Example

Following is the example of using an override keyword to override virtual members of the base class in c# programming language.

 

using System; namespace Tutlane {    // Base Class    public class BClass    {       public virtual string Name { get; set; }       public virtual void GetInfo()       {          Console.WriteLine("Learn C# Tutorial");       }    }    // Derived Class    public class DClass : BClass    {       private string name;       public override string Name       {          get          {             return name;          }          set          {             if (!string.IsNullOrEmpty(value))             {                name = value;             }             else             {                name = "No Value";             }          }       }       public override void GetInfo()       {          Console.WriteLine("Welcome to Tutlane");       }    }    class Program    {       static void Main(string[] args)       {          DClass d = new DClass();          d.GetInfo();          BClass b = new BClass();          b.GetInfo();          d.Name = string.Empty;          Console.WriteLine(d.Name);          Console.WriteLine("\nPress Enter Key to Exit..");          Console.ReadLine();       }    } }

If you observe the above example, we are overriding a base class (BClass) methods and properties which we defined with the virtual keyword in a derived class (DClass) using the override keyword.

 

When you execute the above c# program, you will get the result below.

 

C# Override Keyword Example Result

 

This is how you can use the override keyword in the derived class to override a base class virtual members such as methods, properties, etc., in c# based on our requirements.

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