title: Background worker hangs whole application
body: <p>Ok here's the pretty light code:</p>
  
  <pre><code>// 
  // numConfigsBindingSource
  // 
  this.numConfigsBindingSource.DataMember = "NumConfigs";
  this.numConfigsBindingSource.DataSource = this.DSNumConfigs;
  
  // Grid
  this.GridNumConfigs.DataSource = this.numConfigsBindingSource;
  
  // 
  // DSNumConfigs
  // 
  this.DSNumConfigs.DataSetName = "DSNumConfigs";
  this.DSNumConfigs.SchemaSerializationMode = System.Data.SchemaSerializationMode.IncludeSchema;
  // 
  // numConfigsTableAdapter
  // 
  this.numConfigsTableAdapter.ClearBeforeFill = false;
  //
  // 
  // DSConfigNumbers
  // 
  this.DSConfigNumbers.DataSetName = "DSConfigNumbers";
  this.DSConfigNumbers.EnforceConstraints = false;
  this.DSConfigNumbers.SchemaSerializationMode =       System.Data.SchemaSerializationMode.IncludeSchema;
  
  private void Form1_Load(object sender, EventArgs e)
  {                
      worker.RunWorkerAsync();
  }
  
  private void worker_DoWork(object sender, DoWorkEventArgs e)
  {
      this.numConfigsTableAdapter.Fill(this.DSNumConfigs.NumConfigs);                    
  }
  </code></pre>
  
  <p>Then I run this code under VS2010 it works find but when I just run release application it's hanging. But if I rewrite this code that isn't using <code>BackgroundWorkers</code> it's works fine.
  Do I need some effort to clearly release background worker? I have tried to lock worker class in <code>Form1_Load</code> it isn't provide any success. Also have tried to lock <code>this.DSNumConfigs</code> in <code>DoWork</code> and also no any successful stuff.</p>