[firebird-support] How to drop database in C# with .Net provider

[Myeongho]

I want to use firebird on C# project. So I had test .net provider by below 
steps.

1. create database
2. open database
3. close database
4. drop database

I saw the error message while try to drop database.
What I have to do for delete the database.

following code & result message is mine.
----------------------------------------------------------
string connectionString =  
  "User=SYSDBA;" +  
  "Password=masterkey;" +  
  "Database=F:\\FirebirdDB\\testdb.fdb;" +  
  "DataSource=localhost;" +  
  "Charset=UTF8;" +  
  "ServerType=0";  
  
try  
{  
  // Create Database  
  FbConnection.CreateDatabase(connectionString);  
  
  // Create Connection object  
  FbConnection conFirebird = new FbConnection(connectionString);  
  
  // Connect  
  conFirebird.Open();  
  
  // Close  
  conFirebird.Close();  
  conFirebird.Dispose();  
  conFirebird = null;  
  
  // Drop Database  
  FbConnection.DropDatabase(connectionString);  
}  
catch (FbException ex)  
{  
  txtResult.AppendText("Occured FbException => Error code : " + 
ex.ErrorCode.ToString() + "\n");  
  
txtResult.AppendText("-------------------------------------------------------------\n");
  
  txtResult.AppendText(ex.ToString() + "\n");  
  
txtResult.AppendText("-------------------------------------------------------------\n");
  
}



Occured FbException => Error code : 335544510 
------------------------------------------------------------- 
FirebirdSql.Data.FirebirdClient.FbException (0x80004005): lock time-out on wait 
transaction 
object F:\FIREBIRDDB\TESTDB.FDB is in use ---> lock time-out on wait 
transaction 
object F:\FIREBIRDDB\TESTDB.FDB is in use 
: 
-------------------------------------------------------------