Why aren't I getting Non-XAML build definitions from TFS 2015 in a C# console App?

[Windows Central Question]

Getting no Non-XAML build definations from TFS 2015 in a C# console App

I am using TFS 2015. I'm having a problem in retrieving non XAML build information from my C# console App using the TFS API. Actually, for one project we have setup for XAML Build definations and for another project, it is non-XAML one. I am able to connect the TFS projects and able to get the XAML defination lists. However, while trying to fetch the Non-XAML definations or builds, it is always an empty array.My code is below,

static void Main(string[] args)
{
try
{
var tfsUri = (args.Length < 1) ? new Uri(ConfigurationManager.AppSettings["ServerUri"]) : new Uri(args[0]);
var userCreds = new NetworkCredential(
ConfigurationManager.AppSettings["Tfs.User"], ConfigurationManager.AppSettings["Tfs.Password"], ConfigurationManager.AppSettings["Tfs.Domain"]);

// var tfsServer = TfsConfigurationServerFactory.GetConfigurationServer(tfsUri, userCreds);
var tfsServer = new TfsConfigurationServer(tfsUri, userCreds);
tfsServer.EnsureAuthenticated();

//// Get the catalog of team project collections
var collectionNodes = tfsServer.CatalogNode.QueryChildren(new[] { CatalogResourceTypes.ProjectCollection }, false, CatalogQueryOptions.None);

//// List the team project collections
foreach (var collectionNode in collectionNodes)
{
//// Use the InstanceId property to get the team project collection
var collectionId = new Guid(collectionNode.Resource.Properties["InstanceId"]);
var teamProjectCollection = tfsServer.GetTeamProjectCollection(collectionId);

//// Get a catalog of team projects for the collection
var projectNodes = collectionNode.QueryChildren(new[] { CatalogResourceTypes.TeamProject }, false, CatalogQueryOptions.None);
foreach (var projectNode in projectNodes)
{
/*
Console.WriteLine("Collection: " + teamProjectCollection.Name); // Print the name of the team project collection
Console.WriteLine(" Team Project: " + projectNode.Resource.DisplayName); // List the team projects in the collection
Console.WriteLine(" Team Project Id: " + projectNode.Resource.Identifier);
*/

//// Get a catalog of team builds for the collection
var buildDefinitions = new BuildDefinition();

// var buildDetailList = buildDefinitions.GetBuildDefinitionListFromProject(teamProjectCollection, projectNode.Resource.DisplayName);
buildDefinitions.GetBuildDetailsFromProject(teamProjectCollection, projectNode.Resource.DisplayName, projectNode.Resource.Identifier);
}
}
}
catch (Exception ex)
{
ErrorLogger.LogError(ex);
}
}

public class BuildDefinition
{
public void GetBuildDetailsFromProject(TfsTeamProjectCollection tfsProjectCollection, string projectName, Guid projectId)
{
var buildService = tfsProjectCollection.GetService<IBuildServer>(); // (IBuildServer)tfs.GetService(typeof(IBuildServer));

var buildDefinitionsList = GetAllBuildDefinitionsFromTheTeamProject(buildService, projectName);
foreach (var buildDefinition in buildDefinitionsList)
{
var bdentities = new BuildDefinitionEntities
{
ProjectId = projectId,
ProjectName = buildDefinition.TeamProject,
BuildTypeId = Convert.ToInt32(buildDefinition.Id),
BuildTypeName = buildDefinition.Name,
ProjectDetailPath = string.Format("{0} > {1}", buildDefinition.TeamProject, buildDefinition.Name)
};

var buildDetailSpec = buildService.CreateBuildDetailSpec(buildDefinition);
buildDetailSpec.InformationTypes = null; // for speed improvement
buildDetailSpec.MinFinishTime = DateTime.Now.AddDays(-21); // to get only builds of last 3 weeks
buildDetailSpec.MaxBuildsPerDefinition = 1; // get only one build per build definintion
buildDetailSpec.QueryDeletedOption = QueryDeletedOption.ExcludeDeleted; // get only active builds
buildDetailSpec.QueryOrder = BuildQueryOrder.FinishTimeDescending; // get the latest build only
buildDetailSpec.QueryOptions = QueryOptions.All;

var buildDetailList = buildService.QueryBuilds(buildDetailSpec).Builds;

//// List the team builds for the collection
foreach (var buildDetail in buildDetailList)
{
bdentities.BuildId = buildDetail.RequestIds[0];
bdentities.BuildName = buildDetail.BuildNumber;
bdentities.ArtefactsPath = buildDetail.DropLocation ?? "No Artefacts";
bdentities.BuildCompleted = Convert.ToDateTime(buildDetail.FinishTime) > Convert.ToDateTime(buildDetail.StartTime)
? Convert.ToDateTime(buildDetail.FinishTime)
: Convert.ToDateTime(buildDetail.StartTime);
bdentities.BuildStatus = buildDetail.Status.ToString();
bdentities.SourceGetVersion = buildDetail.SourceGetVersion ?? string.Empty;

if (!string.IsNullOrEmpty(buildDetail.Quality))
{
bdentities.BuildQuality = buildDetail.Quality;
bdentities.BuildQualityChangedDate = Convert.ToDateTime(buildDetail.LastChangedOn);
}

BuildDefinitionDbOperations.ManageTfsBuildDefinitions(bdentities);


}
}
}
private static IBuildDefinition[] GetAllBuildDefinitionsFromTheTeamProject(IBuildServer buildServer, string projectName)
{
var buildDefinitionSpec = buildServer.CreateBuildDefinitionSpec(projectName);
buildDefinitionSpec.TriggerType = DefinitionTriggerType.All;
buildDefinitionSpec.Options = QueryOptions.Definitions;

return buildServer.QueryBuildDefinitions(buildDefinitionSpec).Definitions;
}
}

Actually, I am new to this Tfs system. Would you please guide me where I am wrong?