deadlock even after using ConfigureAwait(false) in Asp.Net flow

Question

I\'m hitting deadlock even after using ConfigureAwait(false), below is the sample code.

As per the sample http://blog.stephencleary.com/2012/02/async-a

Answer 1

It blocks when used in ProjectsRetriever because:

public class ProjectsRetriever
{
    public string GetProjects()
    {
        //querying the result blocks the thread and wait for result.
        var projects = this.GetProjects(uri).Result;
        ... //require Thread1 to continue.
        ...
    }

    private async Task> GetProjects(Uri uri)
    {
        //any thread can continue the method to return result because we use ConfigureAwait(false)
        return await this.projectSystem.GetProjects(uri, Constants.UserName).ConfigureAwait(false);
    }
}

public class ProjectSystem
{
    public async Task> GetProjects(Uri uri, string userName)
    {
        var projectClient = this.GetHttpClient(uri);
        var projects = await projectClient.GetProjects();
        // code here is never hit because it requires Thread1 to continue its execution
        // but Thread1 is blocked in var projects = this.GetProjects(uri).Result;
        ...
}

It does not block when used in ProjectSystem because:

public class ProjectsRetriever
{
    public string GetProjects()
    {
        ...
        var projects = this.GetProjects(uri).Result;
        ...//requires Thread1 to continue
        ...
    }

    private async Task> GetProjects(Uri uri)
    {
        //requires Thread1 to continue
        return await this.projectSystem.GetProjects(uri, Constants.UserName);
    }
}

public class ProjectSystem
{
    public async Task> GetProjects(Uri uri, string userName)
    {
        var projectClient = this.GetHttpClient(uri);
        var projects = await projectClient.GetProjects().ConfigureAwait(false);
        // no deadlock, resumes in a new thread. After this function returns, Thread1 could continue to run
}