Querystring parameters you should not use in your SharePoint application

Today I have been working on a support case where customer experienced exceptions in sharepoint when passing in specific query string parameters which are evaluated by his web parts. The URL looked similar to this:

http://servername/Pages/MyPage.aspx?ID=<number>

The problem here is caused by the fact that the customer used a reserved query string parameter. When creating the SPContext object SharePoint evaluates the following query string parameters if provided:

• FeatureId
  
• ListTemplate
  
• List
  
• ID
  
• VersionNo
  
• ContentTypeId
  
• RootFolder
  
• View
  
• FolderCTID
  
• Mode
  
• Type
  

To ensure that the creation of the SPContext object does not fail your application should ensure that your query string parameters are different from those listed above.