NetworkChange Class C#

C# > System.Net > NetworkInformation > NetworkChange

Use this class to receive notification when the IP address of a network interface changes.
Changes can appears when:

• disconnect network cable
• out of range of a wireless Local Area Network
• hardware failure

Events:

• NetworkAvailabilityChanged

C# NetworkInformation NameSpace

C# > System.Net > NetworkInformation

Provides access to network address information and traffic data.

Classes

• NetworkChange

ReadAllBytes C# Example

C# > Files > File Class > ReadAllBytes

Opens, reads the contents of the file into a byte array, and then closes the file.

Example

Read bytes from jpg file and display to PictureBox.

var bytes = File.ReadAllBytes("D:\\Pics\\1.jpg");

pictureBox1.Image = Image.FromStream(new System.IO.MemoryStream(bytes));

C# File Class

C# > Files > File Class

Use the File class for:

• copy, move, rename, create, open, delete to a single file at a time. 
• get and set file attributes.

All File methods are static.

Methods

• ReadAllBytes
• OpenText
• AppendText
• Move

IsNumeric equivalent in LINQ example

C# > LINQ > IsNumeric

IsNumeric equivalent in LINQ example.

double value;

var total = (from DataRow dr in dataTable.Rows

                where double.TryParse(dr["value"], out value)

                select Convert.ToDouble(dr["value"])).Sum();

Dependency Injection C# Example

C# > Patterns > Dependency Injection 

Dependency injection promotes loose coupling of components by passing dependencies to an object rather than having an object instantiate its own dependencies.(http://www.blackwasp.co.uk/DependencyInjection.aspx)

• Autofac
• Autofac modules

       

Example

        public interface ITruck

        {

            void Go(double distance);

        }

        public class Truck : ITruck

        {

            public double Consumption{ get; set; }

            public void Go(double distance)

            {

                double necessary_fuel = Consumption * distance;

            }

        }

        public interface IRoute

        {

            void AddTruck(ITruck dependency);

        }

        public class Route : IRoute

        {

            ITruck _truck;

            public double Distance { get; set; }

            public void AddTruck(ITruck truck)

            {

                _truck = truck;

            }

            public void TruckGo()

            {

                _truck.Go(Distance);

            }

        }

            Route route = new Route();

            route.Distance = 100;

            Truck truck = new Truck();

            truck.Consumption = 20;

           

            route.AddTruck(truck);

            route.TruckGo();

C# System.Security AccessControl

C# > System.Security > AccessControl

With AccessControl you can control, access and audit security related actions on securable objects.

• AuthorizationRuleCollection