how to access base class method in derived class in c#

By using the Base key word you can use the base class method into the derived class;

// base class

    public class BaseClass

    {

        protected virtual void GetValue()

        {

            // Write the code stuff

        }

    }

    // derived class

    public class DerivedClass : BaseClass

    {

        protected  override void GetValue()

        {

            base.GetValue();//CCalling the base class method

            DoGetOtherValue();

        }

        private void DoGetOtherValue()

        {

            //perform other operations

        }

     

    }