Azure DevOps - Get the capacity of your team in the current sprint programmatically

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using Microsoft.TeamFoundation.Core.WebApi.Types;
    using Microsoft.TeamFoundation.Work.WebApi;
    using Microsoft.VisualStudio.Services.Common;
    using Microsoft.VisualStudio.Services.WebApi;

    static async System.Threading.Tasks.Task Main(string[] args)
    {
        Uri azureDevOpsUrl = new Uri("https://dev.azure.com/YOUR_COMPANY_NAME");

        // replace this based on the number of days per sprint
        int NUMBER_OF_DAYS_PER_SPRINT = 10;

        // Create a new personal access token from the Azure DevOps site
        string PERSONAL_ACCESS_TOKEN = "YOUR_PERSONAL_ACCESS_TOKEN";

        using VssConnection vssConnection = 
            new VssConnection(azureDevOpsUrl, new VssBasicCredential(string.Empty, PERSONAL_ACCESS_TOKEN));

        await vssConnection.ConnectAsync();

        // Set the source team context
        TeamContext sourceTeamContext = new TeamContext("THE_NAME_OF_YOUR_PROJECT", "THE_NAME_OF_YOUR_TEAM");

        WorkHttpClient workClient = vssConnection.GetClient<WorkHttpClient>();

        // result contains all the iterations, old & new. We want to pick the current iteration
        List<TeamSettingsIteration> result = await workClient.GetTeamIterationsAsync(sourceTeamContext);

        // Find the single current iteration by checking the TimeFrame attribute
        TeamSettingsIteration currentIteration = result.Single(x => x.Attributes.TimeFrame == TimeFrame.Current);

        List<TeamMemberCapacityIdentityRef> teamMembers = 
            await workClient.GetCapacitiesWithIdentityRefAsync(sourceTeamContext, currentIteration.Id);

        foreach (var teamMember in teamMembers)
        {
            // The daysOff come into a DateRange (from - to) format
            int daysOff = (int)teamMember.DaysOff.Sum(a => (a.End - a.Start).TotalDays + 1);

            // You can also access the Activities by name
            float sprintCapacity = (teamMember.Activities.
                        Select(a => a.CapacityPerDay).Sum())
                            * (NUMBER_OF_DAYS_PER_SPRINT - daysOff);

            Console.WriteLine(daysOff);
            Console.WriteLine(sprintCapacity);
        }
    }