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For example: Foreign key constraints are disabled by default (for backwards compatibility), so must be enabled separately for each database connection.(Note, however, that future releases of SQLite might change so that foreign key constraints enabled by default.Eventually, later versions were integrated with Microsoft Windows and Internet Explorer, and in MDAC 2.8 SP1 they ceased offering MDAC as a redistributable package.
I have faced a very common problem of cross thread exception.
The foreign key constraint is satisfied if for each row in the child table either one or more of the child key columns are NULL, or there exists a row in the parent table for which each parent key column contains a value equal to the value in its associated child key column.
Careful developers will not make any assumptions about whether or not foreign keys are enabled by default but will instead enable or disable them as necessary.) The application can also use a PRAGMA foreign_keys statement to determine if foreign keys are currently enabled.
Microsoft Data Access Components (MDAC; also known as Windows DAC) is a framework of interrelated Microsoft technologies that allows programmers a uniform and comprehensive way of developing applications that can access almost any data store.
Because the SQLEnumerator does not supporting async calling, I have added delegates to call those methods asynchronously. NET 2.0, Sql Command object supports async calling to the database.