Code2night - Latest Programming Blogs & Tutorials

21

Jun

2026

Fix Gemini API Error 429: Quota Exceeded on Free Tier (System.InvalidOperationException)

Shubham Saini 112 views

Getting System.InvalidOperationException with Gemini API Error 429 (Quota Exceeded) on the Free Tier? You're not alone! This blog explains why this happens, covers free tier rate limits, and shows you how to fix it fast with retry logic, best practices, and tips on using image models in Gemini free tier.

13

Jun

2026

How to Build a Text-to-SQL AI Chatbot with Semantic Kernel and OpenAI in .NET 8

Shubham Saini 194 views Watch Video

Step-by-step tutorial to build a natural language to SQL chatbot using Microsoft Semantic Kernel, OpenAI function calling, and SQL Server in a .NET 8 Razor Pages app — with source code, architecture, pros, cons, and performance tips.

13

Jun

2026

Test Blog or whatever title you wnat

Shubham Saini 8 views

Here you have to add the descripion

12

Jun

2026

How to Generate Claude API Key & Setup Billing | Anthropic Claude Tutorial

Shubham Saini 146 views Watch Video

In this tutorial, we walk you through how to generate your Claude API key from the Anthropic Console and set up billing for your account. Whether you're a developer or just getting started with AI, this step-by-step guide makes it easy to get up and running with Claude AI quickly and securely.

12

Jun

2026

How to Boost Your YouTube Channel Performance Easily & Automatically with Claude AI Chrome Extension

Shubham Saini 124 views Watch Video

Growing a YouTube channel takes more than just uploading great content — it also requires ongoing optimization of your video titles, descriptions, and metadata to stay discoverable. But manually reviewing every video on your channel is time-consuming and tedious. What if an AI could do that for you, automatically, right inside your browser? In this tutorial, we show you exactly how to use the Claude AI Chrome Extension to analyze your YouTube channel, identify low-performing videos, and autom

11

Jun

2026

Implementing Two-Factor Authentication (2FA) in ASP.NET Core Identity

Shubham Saini 122 views

This guide provides a comprehensive approach to implementing Two-Factor Authentication (2FA) using ASP.NET Core Identity, enhancing security for web applications. Understanding 2FA is crucial as it adds an additional layer of protection against unauthorized access, thereby mitigating risks associated with credential theft. Familiarity with ASP.NET Core Identity and basic authentication concepts is essential before proceeding with the implementation.

11

Jun

2026

Securing ASP.NET Core appsettings.json Using Environment Variables and Secret Management

Shubham Saini 192 views

This article explores how to secure sensitive information in ASP.NET Core applications by utilizing environment variables and the built-in secret management system. Understanding these concepts is crucial for preventing exposure of sensitive data in production environments. Readers should have a basic understanding of ASP.NET Core and its configuration system before diving in.

11

Jun

2026

Preventing Sensitive Data Exposure in ASP.NET Core API Responses with JsonIgnore

Shubham Saini 117 views

In this post, readers will learn how to effectively use the JsonIgnore attribute in ASP.NET Core to prevent sensitive data exposure in API responses. This is crucial for maintaining data privacy and security in modern web applications. A fundamental understanding of ASP.NET Core and JSON serialization is recommended for optimal comprehension.

25

Oct

2022

Paypal Integration in Asp.Net MVC

Shubham Batra 7,800 views Watch Video

Hello guys, we often want to integrate payment gateways in our Asp.Net applications. Some of the most popular payment gateways are payumoney,paypal,stripe and razorpay. We have already covered payumoney and stripe in our blogs. In this article we will see paypal integration in Asp.Net MVC.

16

Mar

2026

Understanding Middleware in ASP.NET Core: A Comprehensive Guide

Shubham Saini 247 views

In this blog post, readers will learn about middleware in ASP.NET Core, its significance in request processing, and how to create custom middleware components. We will explore the lifecycle of middleware, built-in middleware options, and best practices to follow when implementing middleware in your applications.

15

May

2023

Get Mime Type for any extension in Asp.Net

Shubham Batra 8,891 views Watch Video

Hello guys, sometimes we need to get mime type for specific file types. So we will see how we can get mime type for any file extension in Asp.Net.

05

Sep

2021

QR Code Generator

Shubham Batra 10,391 views Watch Video

Hello guys, now a days we often need to add QR Code Generator in our websites to store some information in QR Code for implementing that we will use Jquery QR Code js library with Asp.Net MVC. Jquery QR Code Generator is a free jquery library which can be used across different programming languages.

20

Apr

2026

Understanding Wrong Service Lifetime: Singleton Consuming Scoped in ASP.NET Core

Shubham Saini 168 views

In this post, readers will delve into the intricacies of service lifetimes in ASP.NET Core, specifically focusing on the pitfalls of a Singleton service consuming a Scoped service. This issue is critical to avoid application errors and ensure proper dependency management. A foundational understanding of Dependency Injection (DI) in ASP.NET Core and the differences between Singleton, Scoped, and Transient lifetimes is essential before diving in.

24

Mar

2026

CWE-269: Improper Privilege Management - Implementing the Principle of Least Privilege in Security

Shubham Saini 147 views

This article explores CWE-269, focusing on the critical importance of the Principle of Least Privilege (PoLP) in software security. We will delve into its theoretical foundations, practical implementations, and real-world applications, providing comprehensive code examples and best practices. A solid understanding of access control mechanisms and security principles is beneficial for readers to grasp these concepts fully.

24

Aug

2023

Access Modifiers in Java

Shubham Batra 3,467 views

In Java, access modifiers are keywords that control the visibility and accessibility of classes, fields, methods, and other members within a class or package.

22

Apr

2026

Understanding ModelState.IsValid in ASP.NET Core: Importance, Best Practices, and Real-World Applications

Shubham Saini 161 views

This blog post delves into the significance of checking ModelState.IsValid in ASP.NET Core applications, emphasizing its role in ensuring data integrity during model binding. Readers will learn why this validation step is crucial for preventing runtime errors and maintaining application security. A basic understanding of ASP.NET Core MVC and model binding will be beneficial for following along.

19

Mar

2026

Understanding CWE-89: SQL Injection - How It Works and How to Prevent It

Shubham Saini 269 views

In this blog post, readers will learn about SQL Injection, a critical security vulnerability categorized as CWE-89. We will explore how it works, its implications, and effective strategies to prevent it in web applications.

02

Mar

2024

How to get outlook emails in asp.net

Shubham Batra 4,298 views Watch Video

In this article we will learn how you can get outlook email in asp.net. We will use microsoft exchange services for getting or retrieving the email data from outlook account.

16

Sep

2023

How to export table data in pdf using itextsharp in asp.net mvc

Shubham Batra 6,313 views Watch Video

Often we want to export table data in pdf format using Asp.Net format. We will see how we can use itextsharp library and using that how to export table data in pdf using itextsharp in asp.net mvc

25

Mar

2026

Mastering RxJS Observables in Angular: A Comprehensive Guide

Shubham Saini 142 views

Readers will gain an in-depth understanding of RxJS Observables, their importance in Angular applications, and how to effectively utilize them. Understanding Observables is crucial for managing asynchronous data streams, which are prevalent in modern web applications. Familiarity with Angular components and services, as well as basic JavaScript knowledge, is recommended before diving into this topic.

Free Programming Tutorials, Blogs & Developer Tools

Fix Gemini API Error 429: Quota Exceeded on Free Tier (System.InvalidOperationException)

How to Build a Text-to-SQL AI Chatbot with Semantic Kernel and OpenAI in .NET 8

Test Blog or whatever title you wnat

How to Generate Claude API Key & Setup Billing | Anthropic Claude Tutorial

How to Boost Your YouTube Channel Performance Easily & Automatically with Claude AI Chrome Extension

Implementing Two-Factor Authentication (2FA) in ASP.NET Core Identity

Securing ASP.NET Core appsettings.json Using Environment Variables and Secret Management

Preventing Sensitive Data Exposure in ASP.NET Core API Responses with JsonIgnore

Paypal Integration in Asp.Net MVC

Understanding Middleware in ASP.NET Core: A Comprehensive Guide

Get Mime Type for any extension in Asp.Net

QR Code Generator

Understanding Wrong Service Lifetime: Singleton Consuming Scoped in ASP.NET Core

CWE-269: Improper Privilege Management - Implementing the Principle of Least Privilege in Security

Access Modifiers in Java

Understanding ModelState.IsValid in ASP.NET Core: Importance, Best Practices, and Real-World Applications

Understanding CWE-89: SQL Injection - How It Works and How to Prevent It

How to get outlook emails in asp.net

How to export table data in pdf using itextsharp in asp.net mvc

Mastering RxJS Observables in Angular: A Comprehensive Guide

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