All:
 I have a question about the difference between
SqlConnection.IDisposable.Dispose() and  SqlConnection.Dispose(). Both of them realize the function of releasing the connection to the ConnectionPool? Do they have the same effection source code?  If they are different, who can tell me the differences? If they are same, why MS gives the SqlConnection.IDisposable.Dispose,but only SqlConnection.Dispose() method?
 In the MSDN, there are following description about the
SqlConnection.IDisposable.Dispose Method:
 "This member supports the .NET Framework infrastructure and is not intended to be used directly from your code."  what's the meaning of it?
 If the user has called the SqlConnection.IDisposable.Dispose() in the client application, what probem results in?  and if there are some problem becomes, then why did MS give us such a method?
 in the same, who can tell me the using of
"SqlConnection.ICloneable.Clone "
"SqlConnection.IDbConnection.BeginTransaction" and
"SqlConnection.IDbConnection.CreateCommand"?

 Best Regards!!