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C# - Order of Initialization/Execution in a C# Class

Posted by Rama Subba Reddy Mukkamalla on April 25, 2017

C#.NET Design Patterns OOPs singleton

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C# - Do not call virtual methods in Constructors ( CA2214 )

Posted by Rama Subba Reddy Mukkamalla on April 24, 2017

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C# 6.0 Features - Shortens and Simplifies the code

Posted by Rama Subba Reddy Mukkamalla on April 03, 2017

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ClosedXML – Read/Write Excel File Using C#.NET

Posted by Rama Subba Reddy Mukkamalla on March 26, 2017

C#.NET Developer Productivity Tool

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Visual Studio – Productivity Power Tools

Posted by Rama Subba Reddy Mukkamalla on March 26, 2017

C#.NET Developer Productivity Tool Visual Studio

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Visual Studio – Performance analysis tool

Posted by Rama Subba Reddy Mukkamalla on March 21, 2017

C#.NET Performance Visual Studio

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C#.NET: Send SMS/SMS Integration using Twilio Rest Client

Posted by Rama Subba Reddy Mukkamalla on March 12, 2017

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PACE.JS: Automatic Page Load Progress Bar

Posted by Rama Subba Reddy Mukkamalla on March 01, 2017

Design Tools Developer Productivity Tool Javascript

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Font Awesome : The iconic font and CSS toolkit

Posted by Rama Subba Reddy Mukkamalla on January 19, 2017

Design Tools Developer Productivity Tool

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Lodash.js: JavaScript utility library

Posted by Rama Subba Reddy Mukkamalla on January 08, 2017

Developer Productivity Tool Javascript

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AngularJS Token Based Authentication using ASP.NET Web API, Owin and OAuth

Posted by Rama Subba Reddy Mukkamalla on January 08, 2017

AngularJs TokenAuthentication WebAPI

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Underscore.js : The Best Developer Productivity Tool

Posted by Rama Subba Reddy Mukkamalla on December 08, 2016

Developer Productivity Tool Javascript

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Web API Token Based Authentication using OWIN, OAuth and Existing Login Table

Posted by Rama Subba Reddy Mukkamalla on December 04, 2016

OAuth OWIN TokenAuthentication WebAPI

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Hybrid Mobile Application Using AngularJS, WebAPI and Ionic Framework

Posted by Rama Subba Reddy Mukkamalla on November 30, 2016

AngularJs HybridApplication Ionic WebAPI

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Design Patterns Interview Questions

Posted by Rama Subba Reddy Mukkamalla on November 27, 2016

Design Patterns Gang of Four

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Rama Subba Reddy Mukkamalla: Expert in System Design, Application Architecture, Event-Driven Solutions | AWS Certified Solution Architect | Tech Blogger

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ClosedXML – Read/Write Excel File Using C#.NET

Many of Windows/Web applications having requirement that, get the data from database and import into Excel file. There are several ways for developers to write data into Excel using C#.NET. See the following options 1. Microsoft Excel Interop 2. Microsoft Open XML SDK 3. ClosedXML Microsoft Excel Interop: 1. Office Interop needs Excel driver to be installed on the machine which is generating excel file 2. Excel installed version must match with the interop assembly version 3. Interop calls are expensive in terms of performance Microsoft Open XML SDK: 1. Open XML is developed by Microsoft 2. No need to install Excel driver on the machine 3. It is a document format consists of XML parts stored in ZIP package 4. It is the default format for MS Office 2007/2010 ClosedXML: 1. It is wrapper on Open XML specification 2. No need to install Excel driver on the machine 3. It makes easier for developers to ...

Kubernetes for Developers #1: Kubernetes Architecture and Features

Kubernetes(K8) is an open-source container orchestration tool used for automating deployment, scaling and management of containerized applications. Features: 1. Self-Healing : It restarts container that failed or kills the container that do not respond to container health check endpoint. It always maintains user defined number of replicas 2 . Secret and configuration management : It maintains an application level configuration and secrets in a separate location. So, it can be modified without re-building and deploying container 3. Horizontal scaling: It is easy to scale-up/down containers with a simple command or automatically based on CPU usage. 4. Automatic bin packing: It automatically places containers into the required Worker nodes based on specified CPU/Memory. 5. Storage orchestration : It allows to mount a local storage or cloud providers 6. Automated rollouts and rollbacks: It allows to rollout new application changes by spinning up new container without killing existing conta...

Kubernetes for Developers #14: Kubernetes Deployment YAML manifest in-detail

In previous articles, we have learned how to create or manage Pod manually. However, in real-world use cases, The Pod creation/re-creation should be done automatically and remain healthy without manual intervention, that’s where K8 Deployment comes into the picture. It helps us to manage set of identical pods without creating/updating/deleting pods manually. It makes desired number of identical pods always stay up and running automatically without user intervention. It is a high-level resource, the actual pods are created and managed by the ReplicaSets, not by the Deployment directly. ReplicaSet constantly monitors the list of running pods and makes sure the actual number of pods are always matching the desired number of pods. It there are only few pods are running, it creates new replicas from a pod template. If there are many pods are running than desired number, it removes the excess replicas. Deployment YAML file contains both desired replica count and Pod template in it. Therefor...

Kubernetes for Developers #8: Kubernetes Object Name, Labels, Selectors and Namespace

Object Name Every Kubernetes object has a Name that is unique for that type of resource within the same namespace. It means, we can only have one Pod name called “ mynginx ” within the same namespace. however, we can use same name for another Kubernetes object like Deployment, Service, etc. So, we can set same name i.e., “ mynginx ” to Pod, Deployment, Service, etc. The following characteristics need to be followed while setting name to Kubernetes object. Name should not exceed 253 characters It contains only lowercase alphanumeric characters (a to z), hyphen (-), period(.) It should start with an alphanumeric character It should end with an alphanumeric character apiVersion : v1 kind : Pod metadata : name : mynginx spec : Labels Label is a key-value pair which is attached to pods, deployments, etc. It acts an identifier on K8 object (Ex: Pod or Deployment). So, the other Kubernetes objects (Ex: Service, DaemonSet) can communicate by matching same ...

Kubernetes for Developers #9: Kubernetes Pod Lifecycle

A Pod is a group of one or more containers (consider docker containers) with shared storage and network resources. Network : Pods get unique IP address automatically and all the containers in the Pod communicate each other using localhost and Port Storage: Pods can be attached to Volumes that can be shared among the containers A Pod is designed to run a single instance of an application inside node of Kubernetes cluster. Types of Pod: Single container Pod : The “one-container-per-pod” is the most common use case and Kubernetes manage Pod rather than container directly. Multi container Pod : A Pod can group multiple containers with shared storage volumes and network resources. Generally, we name it as Primary container and Sidecar container. Ex : Primary container used to serve data stored in the filesystem/volume to outer world whereas Sidecar container used to refresh the filesystem/volume. Pod lifecycle : Pods are ephemeral and not designed to run forever, when Pod is terminated...

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