Code Quality - Dispose implementation update

Author: abhinavminhas

QueryDB/Connection/Database/MySqlDBConnection.cs

@@ -6,7 +6,7 @@ namespace QueryDB.Connection.Database
     /// <summary>
     /// 'MySQL' database connection.
     /// </summary>
-    internal class MySqlDBConnection : IDisposable
+    internal sealed class MySqlDBConnection : IDisposable
     {
         /// <summary>
         /// Holds 'MySQL' connection.
@@ -28,8 +28,10 @@ internal MySqlDBConnection(string connectionString)
         public void Dispose()
         {
             if (MySqlConnection != null)
+            {
+                MySqlConnection.Close();
                 MySqlConnection.Dispose();
+            }    
         }
-
     }
 }

QueryDB/Connection/Database/OracleDBConnection.cs

@@ -6,7 +6,7 @@ namespace QueryDB.Connection.Database
     /// <summary>
     /// 'Oracle' database connection.
     /// </summary>
-    internal class OracleDBConnection : IDisposable
+    internal sealed class OracleDBConnection : IDisposable
     {
         /// <summary>
         /// Holds 'Oracle' connection.
@@ -28,7 +28,10 @@ internal OracleDBConnection(string connectionString)
         public void Dispose()
         {
             if (OracleConnection != null)
+            {
+                OracleConnection.Clone();
                 OracleConnection.Dispose();
+            }
         }
     }
 }

QueryDB/Connection/Database/SqlDBConnection.cs

@@ -6,7 +6,7 @@ namespace QueryDB.Connection.Database
     /// <summary>
     /// 'Sql Server' database connection.
     /// </summary>
-    internal class SqlDBConnection : IDisposable
+    internal sealed class SqlDBConnection : IDisposable
     {
         /// <summary>
         /// Holds 'Sql Server' connection.
@@ -28,7 +28,10 @@ internal SqlDBConnection(string connectionString)
         public void Dispose()
         {
             if (SqlConnection != null)
+            {
+                SqlConnection.Close();
                 SqlConnection.Dispose();
+            }
         }
     }
 }