Refers to an options parameter but does not define

One of the constructors refers to an 'options' parameter of type string, but there is no reference to what options are available or where to reference them.

In some cases the following exception is returned if an option is not specified: "When using SqlDependency without providing an options value, SqlDependency.Start() must be called prior to execution of a command added to the SqlDependency instance.'"

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* ID: 2463bf3e-29d2-edcb-4954-2b962eb92564
* Version Independent ID: a10d03d9-649d-703b-7d28-e1f20e3f099b
* Content: [SqlDependency Constructor (System.Data.SqlClient)](https://docs.microsoft.com/en-us/dotnet/api/system.data.sqlclient.sqldependency.-ctor?view=netframework-4.7.2)
* Content Source: [xml/System.Data.SqlClient/SqlDependency.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Data.SqlClient/SqlDependency.xml)
* Product: **dotnet-api**
* GitHub Login: @douglaslMS
* Microsoft Alias: **douglasl**