gistfile1.cs

class MyForm
{
  public void UpdateProgress(int step) { 
    if (InvokeRequired) { 
      this.Invoke(new Action<int>(UpdateProgress), step); 
    } else { 
      prgOverallProgress.Value = step; 
    } 
  }
  
  public void DoBtnClick()
  {
    Task.Factory.StartNew(() => 
    { 
      var c = new MyClass();
      c.GetTeamProjects(UpdateProgress); 
    });
    
  }
}

class MyClass 
{
  void GetTeamProjects(Action<int> updateStatus)
  {
    //do stuff
    //on update of the status
    updateStatus(x);
  }
}