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As name suggested "Single Page" application that means a page that is independent of any other page while being served over the web. Confused?  No problem! I understand it little bit confusing here. Let me expain you in simple word with example. You must have heard about asp.net/java web applications. These are the example of multi-page applications platform. In multipage application when you nevigate from one page to another page everytime new request with totally altogather new HTML page will be served from the server which result the performance and rendering of pages slow. In other hand when you request new page in single page applications only body tag get refrshed on the client browser. which result the user experiance better. If still you have any query/question please comment and I will try to explain in more details.

Solid principle teach us how to code in better and efficient way so that the code can be easily understandable, highly maintainable and highly reusable. We can get rid of problems that occurred during application development. S for Single Responsibility O for Open Close Principle L for Liskov Substitution I for Inversion Control D for Dependancy Inversion Note: For example or explanation, Please ask through comment.

ngModel provides us the mechanism to sync input data/data from any source (like Web API, Database) from HTML control element to the component class. Understand this in the very easy way: Suppose you have a user class named with User as following: export class User { id : number ; email : string ; constructor ( values : Object = {}) { //Constructor initialization Object . assign ( this , values ); } } And in HTML, you have a textbox for binding email property of the user class. For simplicity, we will call User class to "U" and textbox control to "T".  So here are the following definitions: ngModel provides the way of binding data from U to T and/or vice-versa. [ngModel]="user.email" is the syntax for one-way binding, while, [(ngModel)]="user.email" is for two-way binding, and the syntax is compound from [ngModel]="user.email" and (ngModelChan

Inheritance: Inheritance is the strong concept of the world of object-oriented programing. In a Simple word, The mechanism of accessing or extending the behavior or properties of an existing class is known as Inheritance. For an example, If a class has methods let say Add(int s, int n) and its added two given values. So if we are going to create any class and we want to create an Add function of two variable then why we create it from scratch if this is available in an existing class. Yes, We can use the Add function of existing class in a new class as below: public class ExistingClass {    public int Add(int s, int n)    {       return s+n;    } } and the new class is: public class NewClass : ExistingClass {    base.Add(110,210); // this will call the existing methods }

An object is a real-time entity by which a class comes into existence. Without creating the object we can not use the class. For Example: public class MyClass {    int x=10;   public void MyFunction()   {      Console.WriteLine(x.ToString());    } } If we want to use the MyClass's MyFunction in another class then we have to create an object of MyClass in another class like below: public class MyOtherClass { //  Here we want to use the MyFunction of MyClass the create an object of this.     MyClass obj=new MyClass(); // By this line of code object will be created and stored as "obj".    //Now by the help of this "obj" we can call the MyFunction(); as below.    obj.MyFucntion(); } Output: 10. What is Inheritance in C# .Net ?

In Opps/C# everything written in a class, unlike procedural language C. So a class is a template, block, unit or blueprint that contains the data member (variable/properties) and its member functions.  A class must be defined by a keyword "class". public class MyClass {     int x=10;  // Data member;       public void MyFunction(); // Member Function;   } What is Object in C# ?