Block reference rename

# Region renaming block reference
/// <Summary>
/// Rename the block reference
/// </Summary>
/// <Param name = "DB"> current database </param>
/// <Param name = "oldblockname"> block reference old name </param>
/// <Param name = "newblockname"> block reference new name </param>
Public static void renameblock (this database dB, string oldblockname, string newblockname)
{
Using (transaction trans = dB. transactionmanager. starttransaction ())
{
// Obtain the current block table
Blocktable bt = (blocktable) Trans. GetObject (db. blocktableid, openmode. forread, true );
Blocktablerecord BTR = (blocktablerecord) Trans. GetObject (BT ["dhead"], openmode. forwrite, true );
BTR. Name = newblockname;
Trans. Commit ();
}
}
# Endregion