Free C# .NET Project Management API to Handle MS Project MPP & MPX Files

Install Aspose.Tasks for .NET via NuGet

Install-Package redmine-net-api

You can download the directly from GitHub page

How to Create a New Project inside Redmine using C# .NET API?

using Redmine.Net.Api;
using Redmine.Net.Api.Types;

class Program
{
    static void Main(string[] args)
    {
        // Initialize RedmineManager with server URL and API key
        var redmineManager = new RedmineManager("https://redmine.example.com", "your_api_key");

        // Create a new project object
        var newProject = new Project
        {
            Name = "New Project",                      // Set the name of the new project
            Identifier = "new-project",                // Set a unique identifier for the project
            Description = "This is a new project.",    // Set the description of the project
            IsPublic = true,                           // Set whether the project is public or private
            TrackerIds = new List { 1, 2, 3 },    // Set the tracker IDs for the project (e.g., 1 for bug, 2 for feature, 3 for support)
            IssueCustomFieldValues = new List // Set custom field values for the project, if any
            {
                new IssueCustomField { Id = 1, Value = "Custom Value 1" },
                new IssueCustomField { Id = 2, Value = "Custom Value 2" }
            }
        };

        try
        {
            // Create the new project
            Project createdProject = redmineManager.CreateObject(newProject);

            // Output the ID of the newly created project
            Console.WriteLine($"New project created with ID: {createdProject.Id}");
        }
        catch (RedmineException ex)
        {
            // Handle any errors that occur during project creation
            Console.WriteLine($"Error creating project: {ex.Message}");
        }
    }
}

How to Retrieve List of Existing Redmine Projects via C# API

using Redmine.Net.Api;
using Redmine.Net.Api.Types;
using System;

class Program
{
    static void Main(string[] args)
    {
        // Initialize RedmineManager with server URL and API key
        var redmineManager = new RedmineManager("https://redmine.example.com", "your_api_key");

        try
        {
            // Retrieve a list of projects from Redmine
            var projects = redmineManager.GetObjects();

            // Output details of each project
            foreach (var project in projects)
            {
                Console.WriteLine($"Project ID: {project.Id}");
                Console.WriteLine($"Project Name: {project.Name}");
                Console.WriteLine($"Project Description: {project.Description}");
                Console.WriteLine($"Is Project Public: {project.IsPublic}");
                Console.WriteLine();
            }
        }
        catch (RedmineException ex)
        {
            // Handle any errors that occur during project retrieval
            Console.WriteLine($"Error retrieving projects: {ex.Message}");
        }
    }
}