Public Shared Sub SyncConnectionStrings()
    Dim strCon As String
    Dim tyDatabase As typeDatabase
    Dim boolConfigChanged As Boolean
    'Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)
    Dim config As Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None)
    Dim strConnectionString As ConnectionStringSettings            
    For Each strConnectionString In ConfigurationManager.ConnectionStrings
        'More code here,but irrelevant for this question.
    Next
End Sub

代码循环遍历app.config文件中的所有连接字符串. app.config中有三个连接字符串,但找到了四个连接字符串.其中：LocalsqlServer(这是ConfigurationManager.ConnectionStrings.Name)定义了什么？