/// <summary>
/// Saves all changes made in this context to the underlying database.
/// </summary>
/// <returns>
/// The number of state entries written to the underlying database. This can include
/// state entries for entities and/or relationships. Relationship state entries are created for
/// many-to-many relationships and relationships where there is no foreign key property
/// included in the entity class (often referred to as independent associations).
/// </returns>
/// <exception cref="DbUpdateException">An error occurred sending updates to the database.</exception>
/// <exception cref="DbUpdateConcurrencyException">
/// A database command did not affect the expected number of rows. This usually indicates an optimistic
/// concurrency violation; that is, a row has been changed in the database since it was queried.
/// </exception>
/// <exception cref="DbEntityValidationException">
/// The save was aborted because validation of entity property values failed.
/// </exception>
/// <exception cref="NotSupportedException">
/// An attempt was made to use unsupported behavior such as executing multiple asynchronous commands concurrently
/// on the same context instance.</exception>
/// <exception cref="ObjectDisposedException">The context or connection have been disposed.</exception>
/// <exception cref="InvalidOperationException">
/// Some error occurred attempting to process entities in the context either before or after sending commands
/// to the database.
/// </exception>
public virtual int SaveChanges()
{
return(InternalContext.SaveChanges());
}
