Update ADO default branch

UpdateADODefaultBranch.cs

namespace UpdateDefaultBranch
{
    using System;
    using System.Net.Http;
    using System.Net.Http.Headers;
    using System.Text;
    using System.Text.Json;
    using System.Threading.Tasks;
    using Azure.Core;
    using Azure.Identity;

    internal static class Program
    {
        public static async Task Main(string[] args)
        {
            const string organization = "YOUR_ADO_ORG";
            const string project = "YOUR_ADO_PROJECT";

            var credential = new DefaultAzureCredential();
            var token = await credential.GetTokenAsync(new TokenRequestContext(["499b84ac-1321-427f-aa17-267ca6975798/.default"])).ConfigureAwait(false);

            try
            {
                using (var client = new HttpClient())
                {
                    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token.Token);

                    var reposUrl = $"https://dev.azure.com/{organization}/{project}/_apis/git/repositories/?api-version=7.0";
                    var reposResponse = await client.GetAsync(reposUrl).ConfigureAwait(false);
                    if (!reposResponse.IsSuccessStatusCode)
                    {
                        Console.WriteLine($"Error: {reposResponse.ReasonPhrase}");
                    }

                    var reposJson = JsonDocument.Parse(await reposResponse.Content.ReadAsStringAsync().ConfigureAwait(false)).RootElement;
                    var repos = reposJson.GetProperty("value").EnumerateArray();

                    foreach (var repo in repos)
                    {
                        var repoId = repo.GetProperty("id").GetString();
                        var repoName = repo.GetProperty("name").GetString();
                        var repoDetailsPatchUrl = $"https://dev.azure.com/{organization}/_apis/git/repositories/{repoId}?api-version=7.0";
                        var patchContent = new StringContent("{\"defaultBranch\":\"refs/heads/main\"}", Encoding.UTF8, "application/json");
                        var patchResponse = await client.PatchAsync(repoDetailsPatchUrl, patchContent).ConfigureAwait(false);
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error: {ex.Message}");
            }
        }
    }
}