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SQLite connection string: 'Version' keyword is not supported in C#

I have a c# winform project that supposes to save data to SQLite database, I've already used the dll properly and it runs without error, but I get an exception when trigger the method with buttonClick event
here the exception i got : Keyword not supported :'version'.
this the connection string:
"Data Source = Diary.db;Version = 3;New = False;Compress = True;";
and this the complete method :
private void AddToDbaseSQL3()
{
try{
string query = "insert into Diary(title,date,mood,wheater,content)
values('"+TitleTextbox.Text+"','"
+dateTimePicker.Value.Date.ToString("yyyy-MM-dd HH:mm")+"','"
+MoodCombobox.SelectedItem+"','"
+WheaterCombobox.SelectedItem+"','"
+ContentTextbox.Text+"');";;
SqlConnection connect2 = new SqlConnection(connection2);
SqlCommand cmd = new SqlCommand(query,connect2);
SqlDataReader read;
connect2.Open();
read = cmd.ExecuteReader();
while(read.Read())
{
}
MessageBox.Show("created");
TitleTextbox.Text = "Title";
TitleTextbox.ForeColor = SystemColors.ControlLight;
ContentTextbox.Clear();
connect2.Close();
}catch(Exception e){
MessageBox.Show(e.Message);
}
}
I've looked to this link:
Keyword not supported: 'version'
and it said to change SqlConnection to SQLiteConnection but it ended with an error, can you tell what's is the right connection string ? or there is something wrong from my code/method? please tell me, thank you, I'm sorry because it's my first time using the SQLite

SqlConnection from System.Data.SqlClient is for SQL Server.
You need an dedicated SQLite ADO.NET provider.
You can found the System.Data.SQLite provider from SQLite team here:
https://system.data.sqlite.org
Or you can use any libre or commercial provider.
You can also use the free and open-source SQLite ODBC driver that works fine and allow to use VS Visual Designers to create strongly typed ADO.NET DataSets, in addition to the use of OdbcConnection, OdbcCommand and so on:
http://www.ch-werner.de/sqliteodbc
C# Reading data from existing SQLite database

MySQLConnection has no implementation

I'm new to C# and connecting to databases.
The problem is: whenever I try to connect to DB by running this code:
string connparams = "server=127.0.0.1;uid=root;pwd=12345;database=test;";
try
{
MySqlConnection connection = new MySqlConnection(connparams);
}
catch (System.ArgumentException me)
{
Console.WriteLine(me.ToString());
}
connection.Open();
connection.Close();
I get the window "The application is in break mode"
When I take a look at the events window I can see an exception with description "No source code". When I try to see the implementations of functions in MySQLConnection I can see none of them, only declarations. So what should I do/redo/reinstall in order to solve this? Using VS2017, .NET Framework 4.6.1, Connector/NET (MySQL)

Using SQLOLEDB in c# or wpf Devexpress

just run into https://social.msdn.microsoft.com/Forums/sqlserver/en-US/0ff7f210-7697-431b-9e6b-0f2e10f4c031/sql-2016-slow-connection-using-server-name-fast-using-127001?forum=sqlsetupandupgrade.
Is it possible to simply bypasse .net in a c# program and simply have this kind of performance ?
Is this is juste a change in the connection in order to use this provider, or its something more complexe ?
Success: Provider=SQLOLEDB;Data Source=::1;Integrated Security=SSPI
Elapsed: 00:00:00.0015378
Here is how we do it now:
SqlCommand command =
new SqlCommand(queryString, connection);
connection.Open();
SqlDataReader reader = command.ExecuteReader();
// Call Read before accessing data.
while (reader.Read())
{
...
}
// Call Close when done reading.
reader.Close();
Here is the connection string:
Server=...;Database=...;Uid=...;Pwd=...;Encrypt=True;TrustServerCertificate = true;Asynchronous Processing=true;MultipleActiveResultSets=True

That thread is from a user having slow connection times to local SQL Server using .NET's SqlClient, but I couldn't reproduce it.
Are you having some sort of actual problem?
And no, you can't use SqlClient with an OleDB provider or ODBC driver. There are different ADO.NET providers for those. And SQLOLEDB is deprecated, so SqlClient is the only modern, supported SQL Server connection stack that ships as part of Windows.

How to connect to oracle database with ODAC c#

I am using this code but getting an error of 'Object reference not set to an instance of an object.' at con.open() ? what am I doing wrong ?
I have already download and installed ODAC component version 10 , 11 ,12 trying each one at the failure of the latest one but still same error
using Oracle.DataAccess.Client;
namespace WindowsFormsApplication1
{
class OraTest
{
public OracleConnection con = new OracleConnection();
public void Connect()
{
con.ConnectionString = "Data Source=(DESCRIPTION= (ADDRESS = (PROTOCOL = TCP)(HOST =myip) (PORT = myport))(CONNECT_DATA = (SERVER = dedicated)(SERVICE_NAME = mydb)));User ID=myid;Password=mypass;";
con.Open(); //error here
}
public void Close()
{
con.Close();
con.Dispose();
}
}

Please go through this link
Getting Started with Oracle Data Provider for .NET (C# Version)
http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/dotnet/GettingStartedNETVersion/GettingStartedNETVersion.htm

If you add a try/catch block in Connect(), you'll be able to catch the error.
For example:
When opening an oracle connection, connection object is null
I added the try catch block, and it returned ORA12154 - TNS could not
be resolved. After some research, I added an SID to my tnsnames.ora
file in my ODP for .NET Oracle home path, and it worked
See also Troubleshooting Oracle Net Services for troubleshooting possible connection issues from Oracle clients (such as your C# program).
But your first step is absolutely to determine the Oracle-level error (for example, ORA-12543 (could not connect to server host) or TNS-12514 (could not find service name)
MSDN: OracleException Class
public void ShowOracleException()
{
OracleConnection myConnection =
new OracleConnection("Data Source=Oracle8i;Integrated Security=yes");
try
{
myConnection.Open();
}
catch (OracleException e)
{
string errorMessage = "Code: " + e.Code + "\n" +
"Message: " + e.Message;
System.Diagnostics.EventLog log = new System.Diagnostics.EventLog();
log.Source = "My Application";
log.WriteEntry(errorMessage);
Console.WriteLine("An exception occurred. Please contact your system administrator.");
}
}
It's significant that con.ConnectionString = xyz works, but the following `con.Open()" fails. This means .Net is creating the C# object, but Oracle/TNS is failing when you try to use it.
ADDITIONAL SUGGESTIONS:
Re-read
When opening an oracle connection, connection object is null.
Read all of the suggestions, including the one about "Data Source in your connection string".
Focus on your connection string. It couldn't hurt to specify the connection string in your OracleConnection() constructor, if possible. Here's another link:
ODP.NET Connection exception
It would be great if you can verify connectivity from your PC with some other Oracle client, besides your C#/.Net program. To verify you're talking to the right TNS host and service, with the correct username/password. For example, maybe you have SQLDeveloper or sqlplus.
Finally, re-read the TNS troubleshooting link:
https://docs.oracle.com/cd/E11882_01/network.112/e41945/trouble.htm#NETAG016

What worked for me with the same error was to simply switch from the 'plain' Oracle DataAccess library, to the 'Managed' version.
This is an extemely easy change to make -
Add a Reference in your c# project to the Oracle.ManagedDataAccess library
Replace the existing use statements at the top of your Oracle client code with the following:
using Oracle.ManagedDataAccess.Client;
using Oracle.ManagedDataAccess.Types;
Include the Oracle.ManagedDataAccess.dll file with your exe

OracleClient, intermittent connection issue: app hangs on OracleConnection.Open(), no timeout, no exception thrown

Application works fine and connects every single time from any machine except the server, where it's supposed to be deployed :/ When run on the server it manages to connect once in like 20 or something attempts. Judging on the funky symptoms, I suspect it to be some kind of a network configuration related issue (as in some randomly lost packets?), but my fellow network administrator tried many different settings and we were not able to find the cause/solution.
Every single piece of advise will be appreciated, as it's seriously driving me nuts. I was wondering if switching to ODP.NET would solve the problem or at least make it easier to troubleshoot (I've read MS's provider is not very stable). However, since the architecture is not very flexible, it would take quite a lot of time to switch. But if it's the only reasonable thing to do...
Piece of code I'm using:
DbConnection conn = new OracleConnection();
conn.ConnectionString = _connectionString;
try
{
conn.Open();
DbCommand cmd = conn.CreateCommand();
cmd.CommandText = "select sysdate from dual";
cmd.Connection = conn;
_logger.Info("Sysdate: " + cmd.ExecuteScalar().ToString());
}
catch (OracleException oex)
{
_logger.ErrorException("Oracle exception: " + oex.Message, oex);
}
catch (Exception ex)
{
_logger.ErrorException("Exception: " + ex.Message, ex);
}
finally
{
if (conn != null) conn.Close();
}
More info:
Provider: System.Data.OracleClient
Lib: instantclient-basiclite-win32-10.2.0.3-20061115
Connection string is of the form: Data Source=ip_address:port_number/instance;Persist Security Info=True;User ID=user;Password=passwd
Other apps which connect without a problem: QueryExpress using same libs, Sql Developer
Os: Windows Server 2008 Standard SP 2

We ended up using ODP.NET because of some buggy issues we were having using WCF transferring data from our service to Oracle. I dont recall the actual issue-think something was not working with a certain data type-but it ended up working out pretty well for us.