.NET SDK Installation and Setup in C Sharp (C#) - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the .NET SDK?

The .NET SDK is a set of tools and libraries that developers use to build, run, and publish .NET applications. It includes the compiler, runtime, and command-line tools.

beginner

How do you verify if the .NET SDK is installed on your computer?

Open a command prompt or terminal and type dotnet --version. If the SDK is installed, it will show the installed version number.

beginner

Which website do you visit to download the .NET SDK?

You can download the .NET SDK from the official Microsoft website: https://dotnet.microsoft.com/en-us/download

beginner

What command creates a new console application after installing the .NET SDK?

Use the command dotnet new console -o MyApp to create a new console app in a folder named MyApp.

intermediate

Why is it important to add the .NET SDK to your system PATH?

Adding the .NET SDK to your system PATH allows you to run dotnet commands from any folder in the terminal without specifying the full path.

What command shows the installed .NET SDK version?

A dotnet --version

B dotnet --install

C dotnet --list

D dotnet --help

The command dotnet --version displays the installed SDK version.

Where do you download the official .NET SDK?

A https://nuget.org

B https://github.com/dotnet/sdk

C https://dotnet.microsoft.com/en-us/download

D https://microsoft.com/windows

The official .NET SDK is available at the Microsoft .NET download page.

Which command creates a new console app named MyApp?

A dotnet build MyApp

B dotnet create console MyApp

C dotnet init console MyApp

D dotnet new console -o MyApp

The dotnet new console -o MyApp command creates a new console app in the MyApp folder.

Why add .NET SDK to system PATH?

A To run dotnet commands from any folder

B To speed up the computer

C To uninstall the SDK

D To update Windows

Adding to PATH lets you run dotnet commands anywhere in the terminal.

What happens if you run dotnet --version and get an error?

A Your computer is broken

B The .NET SDK is not installed or not in PATH

C You need to restart the computer

D The command is deprecated

An error means the SDK is missing or the PATH is not set correctly.

Explain the steps to install and verify the .NET SDK on your computer.

Think about where to get it, how to install, and how to check it works.

Describe how to create a new console application using the .NET SDK command line.

Focus on commands and folder creation.

Practice

1. What is the primary purpose of installing the .NET SDK on your computer?

easy

A. To build and run C# programs

B. To browse the internet

C. To edit images

D. To play music files

Solution

1. Step 1: Understand what SDK means

   The .NET SDK contains tools needed to develop and run C# programs.

2. Step 2: Match purpose with options

   Only To build and run C# programs mentions building and running C# programs, which is the SDK's purpose.

3. Final Answer:

   To build and run C# programs -> Option A

4. Quick Check:

   .NET SDK purpose = build and run C# programs [OK]

Hint: SDK is for development tools, not unrelated tasks [OK]

Common Mistakes:

• Confusing SDK with software for browsing or media
• Thinking SDK is only for running, not building
• Assuming SDK is an editor or player

2. Which command correctly checks the installed .NET SDK version in the terminal?

easy

A. dotnet check-version

B. dotnet version

C. dotnet --version

D. dotnet show version

Solution

1. Step 1: Recall the official command

   The official command to check .NET SDK version is dotnet --version.

2. Step 2: Compare with options

   Only dotnet --version matches the exact command syntax.

3. Final Answer:

   dotnet --version -> Option C

4. Quick Check:

   Check version command = dotnet --version [OK]

Hint: Use double dash before version to check SDK version [OK]

Common Mistakes:

• Using single dash or missing dashes
• Adding extra words like 'check' or 'show'
• Confusing with other dotnet commands

3. After installing the .NET SDK, you run these commands:

dotnet new console -o MyApp
cd MyApp
dotnet run

What will be the output?

medium

A. Error: Command not found

B. Hello, World!

C. No output, program does nothing

D. Project creation failed

Solution

1. Step 1: Understand commands run

   dotnet new console -o MyApp creates a new console app named MyApp; cd MyApp moves into that folder; dotnet run runs the app.

2. Step 2: Recall default console app output

   The default console app prints "Hello, World!" when run.

3. Final Answer:

   Hello, World! -> Option B

4. Quick Check:

   dotnet new console output = Hello, World! [OK]

Hint: Default console app prints Hello, World! on run [OK]

Common Mistakes:

• Expecting no output or errors after correct commands
• Confusing project creation with running
• Not changing directory before running

4. You try to run dotnet run but get an error saying no project found. What is the most likely cause?

medium

A. You did not navigate into the project folder

B. The .NET SDK is not installed

C. You typed dotnet run incorrectly

D. Your computer is offline

Solution

1. Step 1: Analyze error message

   Error says no project found, meaning dotnet run can't find a project file in current folder.

2. Step 2: Identify common cause

   This usually happens if you forget to change directory into the project folder after creating it.

3. Final Answer:

   You did not navigate into the project folder -> Option A

4. Quick Check:

   No project found error = wrong folder [OK]

Hint: Always cd into project folder before running dotnet run [OK]

Common Mistakes:

• Assuming SDK is missing without checking
• Blaming internet connection for local build errors
• Ignoring folder navigation step

5. You want to create a new console app named Calculator and run it immediately. Which sequence of commands is correct?

hard

A. dotnet new console Calculator && dotnet run

B. dotnet run Calculator && dotnet new console

C. cd Calculator && dotnet new console && dotnet run

D. dotnet new console -o Calculator && cd Calculator && dotnet run

Solution

1. Step 1: Understand command order

   First create project folder with dotnet new console -o Calculator, then move into it with cd Calculator, then run with dotnet run.

2. Step 2: Check options for correct syntax and order

   Only dotnet new console -o Calculator && cd Calculator && dotnet run has correct order and syntax to create, enter folder, and run.

3. Final Answer:

   dotnet new console -o Calculator && cd Calculator && dotnet run -> Option D

4. Quick Check:

   Create, cd, run sequence = dotnet new console -o Calculator && cd Calculator && dotnet run [OK]

Hint: Create folder, cd in, then run in that folder [OK]

Common Mistakes:

• Running before creating project
• Not changing directory before running
• Using wrong command syntax for project creation