Godot mono(c#) SQL Server connection problem

Question

I'm using godot C# stable v3.4 and using VScode an external editor with C# code and trying to make a connection between my project using C# and SQL Server using SQL server management studio 2019 and here is my initial code

using Godot;
using System;
using System.Data.SqlClient;
public class Control : Godot.Control
{
public override void Ready()
{
SqlConnection conn = new SqlConnection("Server=DESKTOP-CQUGBAI;Database=SMS;TrustedConnection=True;");
try
{
conn.Open();
OS.Alert("Open", "Message Box");
}
catch(Exception ex)
{
OS.Alert(ex.ToString(), "Message Box");
}
}
}

the problem is the debug stoped at the SqlConnection object and give me this message

for better quality

Comments

This has to be a path issue; perhaps 'Mono.Security.dll' is missing from the output folder? Unsure if you've added it as a dependency to your project? Perhaps look into the msbuild output and ensure the assembly is present.

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Where can I find mono.security.dll fill and how to add it to my project sorry but can you guide me It's my first time dealing with godo mono stuff