GW-FUB

public class DBContext
{
  private LiteDatabase _userDB;
  
  public static DBContext Instance { get; } = new DBContext(DefaultDatabaseFolderPath);
  
  ...
  
  string userDataDBFilePath = Path.Combine(DatabaseFolderPath, "UserData.lite");
  _userDB = new LiteDatabase(GetConnectionString(userDataDBFilePath))

GW-FUB

using System;

public static class MathExtensions
{
	/// <returns> true, if the values differ fewer than the tolerance. </returns>
	public static bool EqualsNearly(this double a, double b, double tolerance) => Math.Abs(a - b) < tolerance;
}