C# Base Keyword

In c#, the base keyword is useful to access base class members such as properties, methods, etc., in the derived class.

Using the base keyword, we can call a base class method that has been overridden by another method in the derived class, and we can specify which base class constructor should be called while creating an instance of the derived class.

C# Base Keyword Example

Following is the example of using a base keyword to access base class properties and the method that has been overridden by the derived class in the c# programming language.

using System;

namespace Tutlane
{
    // Base Class
    public class Users
    {
        public string name = "Suresh Dasari";
        public string location = "Hyderabad";
        public int age = 32;
        public virtual void GetInfo()
        {
            Console.WriteLine("Name: {0}", name);
            Console.WriteLine("Location: {0}", location);
        }
    }
    // Derived Class
    public class Details : Users
    {
        public override void GetInfo()
        {
            base.GetInfo();
            Console.WriteLine("Age: {0}", base.age);
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Details d = new Details();
            d.GetInfo();
            Console.WriteLine("\nPress Enter Key to Exit..");
            Console.ReadLine();
        }
    }
}

C# Call Base Class Constructor from Derived Class

As discussed, we can call a base class constructor from the derived class using the base keyword.

Following is the example of specifying which base class constructor should be called while creating an instance of the derived class.

using System;

namespace Tutlane
{
    // Base Class
    public class BClass
    {
        public BClass()
        {
            Console.WriteLine("Welcome to Tutlane");
        }
        public BClass(string a, string b)
        {
            Console.WriteLine("Name: {0}", a);
            Console.WriteLine("Location: {0}", b);
        }
    }
    // Derived Class
    public class DClass : BClass
    {
        // This constructor will call the default constructor
        public DClass() : base()
        {
        }

        // This constructor will call a parameterized constructor
        public DClass(string x, string y) : base(x, y)
        {
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            DClass d = new DClass();
            DClass d1 = new DClass("Suresh Dasari", "Hyderabad");
            Console.WriteLine("\nPress Enter Key to Exit..");
            Console.ReadLine();
        }
    }
}