C#•3y ago

❔ Error CS0579

Error CS0579 Duplicate 'System.Reflection.AssemblyVersionAttribute' attribute PacktLibraryNetStandard2 C:\cs11dotnet7\Chapter05\PacktLibraryNetStandard2\obj\Debug\net7.0\PacktLibraryNetStandard2.AssemblyInfo.cs

Pobiega•9/7/23, 5:27 AM

Read the message. It says you have two assembly version attributes in the same assembly, and that's not allowed

Spirit FlyingOP•9/7/23, 5:28 AM

what is mean assembly version?

Spirit FlyingOP•9/7/23, 5:30 AM

Actually I'm learning C# using markjprice's book and stuck here.

Pobiega•9/7/23, 5:35 AM

That's not really important atm. What is important is that you have two of them.

Pobiega•9/7/23, 5:35 AM

An attribute looks like this: [assembly: AssemblyVersion()][assembly: AssemblyVersion()]

Spirit FlyingOP•9/7/23, 5:36 AM

Pobiega•9/7/23, 5:37 AM

It's not in the csproj files.

Pobiega•9/7/23, 5:37 AM

Check your .cs files

Spirit FlyingOP•9/7/23, 5:38 AM

I have only this one cs file

Pobiega•9/7/23, 5:38 AM

You also have a directory called classlib

Pobiega•9/7/23, 5:38 AM

What's in there?

Spirit FlyingOP•9/7/23, 5:38 AM

bin and obj folder

Spirit FlyingOP•9/7/23, 5:39 AM

can you join meet or zoom?

Pobiega•9/7/23, 5:39 AM

What? But it's included in your project source, according to your screenshot

Pobiega•9/7/23, 5:39 AM

No I cant

Spirit FlyingOP•9/7/23, 5:39 AM

Please help me I'm trying since last 3 days

Spirit FlyingOP•9/7/23, 5:39 AM

So why showing this error

Pobiega•9/7/23, 5:40 AM

Something is fucked with your project setup, I suggest starting from scratch

Pobiega•9/7/23, 5:40 AM

Especially since you have no code written yet

Pobiega•9/7/23, 5:41 AM

I'm on a buss right now typing on my phone, I can not join a screen share ATM ;p

Spirit FlyingOP•9/7/23, 5:41 AM

I have not written any single line yet

Spirit FlyingOP•9/7/23, 5:41 AM

Following this

Problem.pdf362.58KB

Pobiega•9/7/23, 5:44 AM

Ok so start over with a fresh project

Pobiega•9/7/23, 5:44 AM

Because you seem to have included the child project in your primary project

Pobiega•9/7/23, 5:44 AM

And that is not allowed

Pobiega•9/7/23, 5:45 AM

In fact, if you just delete the classlib project entirely, then delete the classlib folder

Pobiega•9/7/23, 5:45 AM

It will probably worn

Pobiega•9/7/23, 5:45 AM

Work

Spirit FlyingOP•9/7/23, 5:47 AM

Maybe you have to say I don't have to add classlib project in PacktLibraryNetStandard2. I have to make it saperate

Pobiega•9/7/23, 5:47 AM

Yeah in a way

Pobiega•9/7/23, 5:47 AM

You can't have a project live inside another projects folder

Pobiega•9/7/23, 5:47 AM

They need to be separate

Pobiega•9/7/23, 5:48 AM

And reference eachother via csproj instead

Spirit FlyingOP•9/7/23, 5:48 AM

Then why in this book written like this? Is this book saying wrong

Pobiega•9/7/23, 5:49 AM

Without checking, I think you misunderstood the book

Pobiega•9/7/23, 5:49 AM

They can live next to eachother, but not one inside the other

Spirit FlyingOP•9/7/23, 5:50 AM

Okay I'm trying all again

Spirit FlyingOP•9/7/23, 11:46 AM

It's just worked Thanks a lot brother I was trying since last 2-3 days. So grateful for you

Pobiega•9/7/23, 11:49 AM

.
├── src
│   ├── YourProject
│   │   ├── Class1.cs
│   │   └── YourProject.csproj
│   └── YourProject.Lib
│       ├── Class1.cs
│       └── YourProject.Lib.csproj
├── test
│   ├── YourProject.Tests
│   │   ├── Class1Tests.cs
│   │   └── YourProject.Tests.csproj
│   └── YourProject.Perf
│       ├── Program.cs
│       └── YourProject.Perf.csproj
├── YourProject.sln
├── .gitignore
├── .editorconfig
└── README

.
├── src
│   ├── YourProject
│   │   ├── Class1.cs
│   │   └── YourProject.csproj
│   └── YourProject.Lib
│       ├── Class1.cs
│       └── YourProject.Lib.csproj
├── test
│   ├── YourProject.Tests
│   │   ├── Class1Tests.cs
│   │   └── YourProject.Tests.csproj
│   └── YourProject.Perf
│       ├── Program.cs
│       └── YourProject.Perf.csproj
├── YourProject.sln
├── .gitignore
├── .editorconfig
└── README

Pobiega•9/7/23, 11:49 AM

this is roughly the structure you should use for your projects

Pobiega•9/7/23, 11:49 AM

you can skip the

src

src

and

test

test

levels if you want, but the you MUST have a separate folder for each project

Pobiega•9/7/23, 11:50 AM

they can never live under eachother

Spirit FlyingOP•9/8/23, 9:10 AM

what is .Lib

Spirit FlyingOP•9/8/23, 9:10 AM

I am totally new for .net

Spirit FlyingOP•9/8/23, 9:11 AM

learning C# right now.

Pobiega•9/8/23, 10:36 AM

that would be your "classlib" project

Pobiega•9/8/23, 10:36 AM

its pretty common for larger codebases to be split into several projects

Spirit FlyingOP•9/9/23, 2:33 AM

What is you current profession?

Pobiega•9/9/23, 7:07 AM

I'm a senior developer for a healthcare software firm, specializing in .NET development and I also help out with devops/ops, meaning taking care of our kubernetes cluster.

Spirit FlyingOP•9/9/23, 7:37 AM

I'm student first learned Python Django. and understood My interest is more in Software dev than ML & AI. SO, learning C#, .NET

. ├── src │ ├── YourProject │ │ ├── Class1.cs │ │ └── YourProject.csproj │ └── YourProject.Lib │ ├── Class1.cs │ └── YourProject.Lib.csproj ├── test │ ├── YourProject.Tests │ │ ├── Class1Tests.cs │ │ └── YourProject.Tests.csproj │ └── YourProject.Perf │ ├── Program.cs │ └── YourProject.Perf.csproj ├── YourProject.sln ├── .gitignore ├── .editorconfig └── README