Update RREADME.md file.

Author: Sullivan008

README.md

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-# Angular-CSharp-.NETCore-ServerSidePagination
+# Angular - C# .NET Core Web API - How to use Server-Side Pagination with Angular AgGrid Component. [Year of Development: 2020]
+
+About the application technologies and operation:
+
+### Technologies:
+
+- Programming Language: C# - TypeScript
+- FrontEnd Side: Angular CLI 9.1.1 (Node: 14.5.0)
+- BackEnd Side: .NET Core 3.1 (Web API)
+- Descriptive Language: HTML5
+- Style Description Language: SCSS (Bootstrap 4.5)
+- Other used modul FrontEnd Side:
+  - rxjs (^6.5.5)
+  - ag-grid-angular (^23.2.1)
+  - ag-grid-community (^23.2.1)
+- Other used modul BackEnd Side:
+  - AutoMapper (v8.0.0)
+
+### BackEnd Application solution structure:
+
+- **Angular-ServerSidePagination-BackEnd**:
+  - Includes Controllers.
+  - Includes IoC DI Registers, with separate configuration files.
+  - Includes Request and Response Models.
+  - Includes AutoMapper Profiles.
+- **Core.Extensions**:
+  - Includes the core extensions (e.g.: QueryableExtension).
+- **Core.Common**:
+  - Includes the DTOs used for the application.
+- **Business.Engine**:
+  - Includes the necessary classes and interfaces to implement Business Logic.
+  - Each Controller has it's own BL interface and class.
+- **Business.Service**:
+  - Includes the necessary classes and interfaces to implement internal business logic.
+  - Each Business Engine has it's own BL interface and class.
+
+### FrontEnd Application solution structure:
+
+- **./src/Footer**:
+  - Includes the Footer on the page.
+- **./src/Header**:
+  - Includes the Navigation Bar on the page.
+- **./src/PageNotFound**:
+  - Contains an item that the application loads if you navigate to the wrong URL.
+- **./src/Dashboard**:
+  - Contains the table of Users (AgGrid) on the page.
+  - Includes the Service that implements HTTP Calls on the BackEnd side.
+  - Includes ResponseModels for Server Side Responses.
+
+### Installation/ Configuration:
+
+1. **[BackEnd]** Restore necessary Packages on the selected project, run the following command in **PM Console**
+
+   ```
+   Update-Package -reinstall
+   ```
+
+2. **[FrontEnd]** If you do not already have the Angular CLI installed on your computer, so run the following command in CMD
+
+   ```
+   npm install -g @angular/cli
+   ```
+
+3. **[FrontEnd]** Restore necessary node_modules, so run the following command in GIT Bash Console in the application Angular-ServerSidePagination-FrontEnd root directory
+
+   ```
+   npm install
+   ```
+
+4. **[FrontEnd]** Start the application client side, so run the following command in GIT Bash Console in the application Angular-ServerSidePagination-FrontEnd root directory
+
+   ```
+   ng serve
+   ```
+
+### About the application:
+
+The purpose of the web application is to list users in an **_AgGrid_** _table_ that can be operated by server-side pagination. User data is read from a MOCK.json file.
+
+#### The application shows the following:
+
+- How to implement **Generic Queryable OrderBy Extension**.
+- How to use **IoC Container** in **ASP.NET Core**.
+- How to separate **IoC Container Configurations** in **ASP.NET Core**.
+- How to implement and register and using **AutoMapper** in **ASP.NET Core**.
+- How to implement and use **HttpServices** in **Angular Component**.
+- How to implement and use **AppRouting** in **Angular Component**.
+- How to implement and use **AgGrid** in **Angular Component**.
+- How to define **DefaultColDef**, **ColumnDefs**, **CacheOverflowSize**, **Components** and how to add this elements for **GridOptions**.
+- How to define **FirstDataRendered**, **GridReady** events and how to connect this events to the **AgGrid**.