Generic in c#

Generic used to code reuse, type safety and increase performance, it consists in declaring a Type with Type parameter that will be instantiate. Declare generic with the help of <T> where T is the Parameterized type. Classes, Interfaces, Methods, Properties, Delegates can be used as a generic type.

Simple program to compare two string parameters using Compare method in CompareValue class.

using System;

namespace Generic

{

    class Program

    {

        static void Main(string[] args)

        {

            CompareValue check = new CompareValue();

            Console.WriteLine(check.Compare("A", "A"));

            Console.ReadKey();

        }

    }

    public class CompareValue

    {

        public bool Compare(string value1, string value2)

        {

            return value1.Equals(value2);

        }

    }

}

Output will be:

True

if check string parameter and integer parameter pass Compare method will throw errors

  Console.WriteLine(check.Compare("A", "123"));

Generic method:

using System;

namespace Generic

{

    class Program

    {

        static void Main(string[] args)

        {

            CompareValue check = new CompareValue();

            Console.WriteLine(check.Compare<string>("A", "A"));

            Console.ReadKey();

        }

    }

    public class CompareValue

    {

        public bool Compare<T>(T value1, T value2)

        {

            return value1.Equals(value2);

        }

    }

}

Output:

True

Generic Class:

using System;

namespace Generic

{

    class Program

    {

        static void Main(string[] args)

        {

            CompareValue<string> check = new CompareValue<string>();

            Console.WriteLine(check.Compare("A", "A"));

            Console.ReadKey();

        }

    }

    public class CompareValue<T>

    {

        public bool Compare(T value1, T value2)

        {

            return value1.Equals(value2);

        }

    }

}

Output:

True

Create integer generic class

using System;

namespace Generic

{

    class Program

    {

        static void Main(string[] args)

        {

            CompareValue<int> check = new CompareValue<int>();

            Console.WriteLine(check.Compare(100, 100));

            Console.ReadKey();

        }

    }

    public class CompareValue<T>

    {

        public bool Compare(T value1, T value2)

        {

            return value1.Equals(value2);

        }

    }

}

Output:

True

If pass parameter 100 , 200 output will be false value:

Console.WriteLine(check.Compare(100, 200));

Output will be:

False

Get method type and method name

Console.WriteLine("Enter TypeName:");

string TypeName = Console.ReadLine();

Type type = Type.GetType(TypeName);

MethodInfo[] methods = type.GetMethods();

foreach (MethodInfo method in methods)

{

    Console.WriteLine(method.ReturnType.Name + " " + method.Name);

}

Console application shows Return type and name of method; method display more than one time its overloaded methods. Full list

Get property and constructor

PropertyInfo[] properties = type.GetProperties();

foreach (PropertyInfo prop in properties)

{

    Console.WriteLine(prop.PropertyType.Name + " " + prop.Name);

}

ConstructorInfo[] constructor = type.GetConstructors();

foreach (ConstructorInfo cons in constructor)

{

    Console.WriteLine(cons.ToString());

}

Complete code:

using System;

using System.Reflection;

namespace Reflection

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("Enter TypeName:");

            string TypeName = Console.ReadLine();

            Type type = Type.GetType(TypeName);

            MethodInfo[] methods = type.GetMethods();

            foreach (MethodInfo method in methods)

            {

                Console.WriteLine(method.ReturnType.Name + " " + method.Name);

            }

            PropertyInfo[] properties = type.GetProperties();

            foreach (PropertyInfo prop in properties)

            {

                Console.WriteLine(prop.PropertyType.Name + " " + prop.Name);

            }

            ConstructorInfo[] constructor = type.GetConstructors();

            foreach (ConstructorInfo cons in constructor)

            {

                Console.WriteLine(cons.ToString());

            }

            Console.ReadKey();

        }

    }

}

Enum GetValues and GetNames Methods

Create Shapes Enum

    public enum Shapes

    {

        Circle,

        Square,

        Rectangle,

        TryAngle

    }

Create integer array then call to Shapes Enum

            //Get Shapes value

            int[] shapeValues = (int[])Enum.GetValues(typeof(Shapes));

            Console.WriteLine("Values from Shapes Enum");

            foreach (int values in shapeValues)

            {

                Console.WriteLine(values);

            }

Create string array then call to Shapes Enum

            //Get Shapes names

            Console.WriteLine("Names from Shapes Enum");

            string[] shapeNames = (string[])Enum.GetNames(typeof(Shapes));

            foreach (string Names in shapeNames)

            {

                Console.WriteLine(Names);

            }

Print both Shapes and values

            //Get Shape names & Values

            Console.WriteLine("Names & values from ShapesValue Enum");

            foreach (ShapesValue shapes in Enum.GetValues(typeof(ShapesValue)))

            {

                Console.WriteLine("{0} - {1}", shapes, (int)shapes);

            }