Sivaprasad S R

Put the below code in xamarin.android (xamarin.droid) project. [assembly: ExportRenderer(typeof(NavigationPage), typeof(CustomNavigationRenderer))] namespace Example {     public class RootNavigationRenderer : NavigationRenderer     {         protected override void OnElementChanged(ElementChangedEventArgs e)         {             base.OnElementChanged(e);             RemoveAppIconFromActionBar();         }         void RemoveAppIconFromActionBar()         {             var actionBar = ((Activity)Context).ActionBar;             actionBar.SetIcon(new ColorDrawable(Color.Transparent.ToAndroid()));         }     } }

var Introduced in C# 3.0 At compile time, the compiler decide the type of variable which is declared.  Need to initialize at the time of deceleration. Visual Studio shows intellisense as the type of variable assigned is known to the compiler. We cannot assign two data type in one variable since the compiler has already assign the data type to the value.       that is : var obj1=1; obj1="hello";    will through an error. dynamic Introduced in C# 3.0 At runtime time, the compiler decide the type of variable which is declared.  No need to initialize at the time of deceleration. Visual Studio intellisense is not available since the type of variable assigned is unknown to the compiler, which will be known only at the run time. We can assign two data type in one variable since the compiler recreate the type when another data type is assigned to the variable.

The   is operator checks if an object can be cast to a specific type. if (someObject is StringBuilder) The as operator attempts to cast an object to a specific type, and returns null if it fails. StringBuilder b = someObject as StringBuilder;

Converting one type of data to another type it is also known as Type Casting.     Type Casting are of two types:           1) Implicit conversion                 int num = 2147483647;                 long bigNum = num;         2) Explicit conversion        double x = 1234.7;                int a;                // Cast double to int.                a = (int)x;