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Home Interviews How would you implement CI/CD for a .NET Core project? – MindStick
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ICSM Computer
ICSM Computer 17 Jun 2025
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Implementing CI/CD (Continuous Integration / Continuous Deployment) for a .NET Core project involves automating the build, testing, and deployment process. Here's a step-by-step breakdown using modern tools like GitHub Actions, Azure DevOps, or GitLab CI/CD.

Step-by-Step CI/CD Implementation for a .NET Core Project

1. Source Control Setup

  • Use Git with GitHub, GitLab, or Azure Repos.
  • Organize branches (e.g., main, develop, feature/*).
  • Enable pull request policies (optional).

2. CI Pipeline – Build & Test Automation

Use a CI pipeline to:

  • Restore NuGet packages
  • Build the .NET solution
  • Run unit tests
  • Run code analysis or linting (optional)

Example: GitHub Actions

.github/workflows/dotnet.yml:

name: Build & Test .NET Core

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v3

    - name: Setup .NET
      uses: actions/setup-dotnet@v3
      with:
        dotnet-version: '7.0.x'  # or 6.0.x, etc.

    - name: Restore dependencies
      run: dotnet restore

    - name: Build
      run: dotnet build --no-restore --configuration Release

    - name: Test
      run: dotnet test --no-build --verbosity normal

3. CD Pipeline – Deployment Automation

Based on environment (dev/staging/prod), deploy using:

  • Azure App Service
  • AWS Elastic Beanstalk / EC2
  • Kubernetes (AKS/EKS)
  • Docker containers

Example: Deploy to Azure App Service

Add to GitHub workflow:

- name: Publish
  run: dotnet publish -c Release -o ./publish

- name: Deploy to Azure Web App
  uses: azure/webapps-deploy@v2
  with:
    app-name: 'your-app-name'
    slot-name: 'production'
    publish-profile: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE }}
    package: ./publish

4. Environment Management

Use Secrets or Variable Groups:

  • GitHub: Settings > Secrets and variables
  • Azure DevOps: Library → Variable Groups
  • Store: DB strings, API keys, Azure publish profile

5. Notification and Rollback

  • Add Slack/Teams/email notifications
  • Enable automatic rollback on failure
  • Use deployment slots (for Azure)

Tools Comparison

Tool CI Support CD Support Hosting Notes
GitHub Actions ✅ ✅ GitHub Native to GitHub, YAML-based
Azure DevOps ✅ ✅ Azure Full Azure integration
GitLab CI ✅ ✅ GitLab/GCP Full DevOps lifecycle
Jenkins ✅ ✅ Self-hosted Plugin-based, flexible

Security Tips

  • Use secret stores, never hardcode credentials
  • Validate pull requests before merging
  • Scan builds with tools like SonarQube or CodeQL
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