title: What does square bracket [] mean in the below code?
body: <p>I got below code from <a href="http://msdn.microsoft.com/en-us/library/dd584174(office.11).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/dd584174(office.11).aspx</a> for adding custom property in webpart tool pane. What does square bracket (<code>[]</code>) mean in the below code?</p>
  
  <pre><code>[Category("Custom Properties")]
          [WebPartStorage(Storage.Personal)]
          [FriendlyNameAttribute("Custom Color")]
          [Description("Select a color from the dropdown list.")]
          [Browsable(true)]
          [XmlElement(typeof(System.Drawing.KnownColor))]
          public System.Drawing.KnownColor MyColor
          {
              get
              {
                  return _myColor;
              }
              set
              {
                  _myColor = value;
              }
          }
  </code></pre>