Multiple ways to create middleware in .NET?

It is software assembled into an app pipeline to handle requests and responses. In simple, it gives us the facility to add additional logic before and after the HTTP request.

𝗛𝗼𝘄 𝗱𝗼𝗲𝘀 𝗺𝗶𝗱𝗱𝗹𝗲𝘄𝗮𝗿𝗲 𝘄𝗼𝗿𝗸 👇 Suppose we have three middleware in our app then for each middleware we enter two times.

First middleware logic is performed then we send it to the next middleware

What is SOLID , why we need these principles and S explained ?
It is combination of 5 design principles
S - Single Responsibility Principle (SRP)
O - Open/Closed Principle (ORP)
L - Liskov Substitution Principle (LSP)
I - Interface Segregation Principle (ISP)

Thread 🧵👇 D - Dependency Inversion Principle (DIP)

Why we need SOLID or its benefits
- Better Testability
- Reduces coupling
- Removes Duplication
- Increases Readability
- Increases Extensibility

SRP says :-
- A class/method should have one reason to change

Are you struggling to find right resources to learn C# and .NET then check these out ?

𝐘𝐨𝐮𝐓𝐮𝐛𝐞 𝐂𝐡𝐚𝐧𝐧𝐞𝐥𝐬
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Why should we use NodaTime over Default .NET DateTime ?

These are the 7 reasons

1) Lack of clarity in DateTime especially when comparing local and UTC times🔽👇

#dotnet 2) DateTimeKind property and various operations like ToUniversalTime() and ToLocalTime() can lead to unexpected results

3) DateTime does not provide a comprehensive solution for handling time zones.

#dotnet

Are you using required keyword with properties ?

Since C# 11 we can add required keyword with properties , it will force to initialize that property at the time of object creation.

There are few benefits of using it
- Less chance of error
- Get rid of validation code

#dotnet - If something is essential make it required

Compiler will give error if you don't initialize that property.

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What is the difference b/w field and property , what are the different types of properties in C# ?

- Properties
- Field vs Properties
- 6 Types of Properties

#dotnet Properties vs Field

- Properties are first class citizens in C#
- We used properties to achieve abstraction
- Properties are implemented via accessors
- Enable developers to write code that accurately expresses their design intent
#dotnet

💡𝐃𝐨𝐧’𝐭 𝐑𝐞𝐩𝐞𝐚𝐭 𝐘𝐨𝐮𝐫𝐬𝐞𝐥𝐟 (𝐃𝐑𝐘) 𝐏𝐫𝐢𝐧𝐜𝐢𝐩𝐥𝐞

It states that don’t repeat yourself what it means it is saying don’t duplicate code , avoid duplication. Purpose is to reduce the redundant code in your application 🧵⏬
#dotnet Following the DRY Principle can give us following benefits

1.  Improved maintainability of code

2.  Reduces the risks of bugs

3.  Code becomes easier to understand

#dotnet

💡 NULL Operators Guide in C#

- Ternary Operator (? :)

- Null Forgiving Operator (!.)

- Null Conditional Operator (?.)

- Null Coalescing Operator (??)

- Null Coalescing Assignment Operator (??=) 🧵⏬

#dotnet Ternary Operator or Conditional Operator(?.)  is used to evaluate a condition and then we can do something on that basis for true and false

#dotnet

💡HTTP Client Class in C#

. Introduction
Methods
Properties
Dependency injection 🧵⏬

#dotnet HttpClient is a class in C# that is used for making HTTP calls of different kinds (most commonly Get/Put/Delete/Post).This class comes from namespace System.Net.Http

💡 15+ .NET Libraries you should Know

Now a days libraries play an important role in your development, start learning these libraries for a good development experience.

- Mediator for CQRS
- Dapper for micro-ORM

See more🧵⏬
#dotnet - Serilog and NLog for logging

- Bogus for fake data generation

- Fluent Validation for validations

- SignalR for real time communication

- Moq for mock interfaces and classes

- Hangfire and Quartz for background jobs

- Noda Time best in the town for date-time

#dotnet

💡IEnumerable vs IQueryAble in .NET

1) Whatis IEnumerable
2) What is IQueryAble
3) Difference b/w them ⏬

#csharp #dotnet IEnumerable and IQueryable interfaces are both used to work with collections of data and both support LINQ (Language Integrated Query)
#dotnet

💡Tracking vs Non Tracking Queries in .NET
1) Tracking Queries
2) Non Tracking Queries
3) Identity Resolution
4) How to set tracking by default for context🧵🔽
#dotnet 𝐓𝐫𝐚𝐜𝐤𝐢𝐧𝐠 : By default all queries are tracked , so behind the seen a change tracker keeps working on each entity. If you want to perform Update/Delete then you should use tracking.
#dotnet

💡Global Error Handling in .NET ?
1) Why we need it
2) Pros and cons
3) Code implementation🧵🔽

#dotnet While working with .NET application we sometime come up with exception and we can deal with it in two ways , either by using try catch block in each class (controller level or service level) or we can define a centralized and global point to catch the exception.
#dotnet

💡Response Caching in .NET

1. Introduction
2. How to implement it
3. Code
4. Benefits
5. Constraints
6. Real examples🧵🔽

#csharp #dotnet It is a technique for storing the responses of an API in a cache so that they can be served faster to sub sequent requests.

Responses is stored with a key that uniquely identifies them, the cache has a limited size and a policy for removing items when it becomes full

#dotnet

💡 Life of Query in EF

𝐒𝐭𝐞𝐩 𝟏 : The LINQ Query is processed by EF Core and build an representation that is processed by database provider, and the result is cached later on so we don't need to process it every time #dotnet

See thread 🧵⏬ 𝐒𝐭𝐞𝐩 𝟐 : The result is passed to the db provider and db provider identifies which parts of query can be evaluated in db, these parts are then translated into query language (e.g. SQL) after that translated query is sent to db and db returns results (but not entity instances)

💡 7 Tips to write better LINQ Queries

𝐔𝐬𝐞 𝐨𝐟 𝐀𝐬𝐍𝐨𝐓𝐫𝐚𝐜𝐤𝐢𝐧𝐠 : For read only queries e.g. (GetAll,GetById etc.) use AsNoTracking , when we use it entities are not tracked for change so it brings data more speedily. #dotnet

See thread 🧵🔽 𝐈𝐧𝐜𝐥𝐮𝐝𝐞 𝐧𝐞𝐜𝐞𝐬𝐬𝐚𝐫𝐲 𝐄𝐧𝐭𝐢𝐭𝐢𝐞𝐬 𝐚𝐧𝐝 𝐂𝐨𝐥𝐮𝐦𝐧𝐬 : While retrieving data from multiple table make sure to include only necessary tables and columns Use eager loading only when it is necessary.
#dotnet

💡 How to store Password in Database

Three common practices that are used for passwords, but first two has some serious issues.

✔️ Plain text password
✔️ Hashed password
✔️ Hashed password with Salt
✔️What is Salt
✔️How to validated hash password

#dotnet

#csharp #dotnet 1️⃣ Plain Text Password
Saving password in plain text is the worst approach because it is open to everyone who has database access and an easy target for attackers. Its not recommended at all.

💡 Do and Don't for string in C#

1. Always use
2. Don't use 🔁

✉️If you like my tweets, please join 400+ Software Engineers to receive an actionable tip weekly in your inbox through my Newsletter.(lnkd.in/d69Va5CM)

#csharp #dotnet #dotnetcore ✅Use an overload of the String.Equals method to test whether two strings are equal

✅Use the String.Compare and String.CompareTo methods to sort strings, not to check for equality.

Method Safety and Idempotency

1. HTTP Methods Introduction
2. Method safety with examples
3. Method Idempotency with examples
🧵⏬

#csharp #dotnet #dotnetcore GET is used to retrieve data, POST is used to save, PUT is used to update existing data edit is common example of it, PATCH is lighter version of PUT , it is used to update just a specific information instead of updating all data on server DELETE is used to remove records.