Limpieza usando recomendaciones de R#

ServerExplorer/UI/FrmExec.cs

@@ -1,13 +1,9 @@
 using System;
-using System.Collections.Generic;
-using System.ComponentModel;
 using System.Data;
-using System.Drawing;
-using System.Linq;
-using System.Text;
-using System.Windows.Forms;
 using System.Data.SqlClient;
+using System.Drawing;
 using System.Globalization;
+using System.Windows.Forms;
 
 namespace ServerExplorer.UI
 {
@@ -15,7 +11,7 @@ namespace ServerExplorer.UI
     {
         #region Declarations
 
-        private string cnxString;
+        private readonly string _cnxString;
 
         #endregion
 
@@ -25,7 +21,7 @@ namespace ServerExplorer.UI
         {
             InitializeComponent();
 
-            this.cnxString = cnxString;
+            _cnxString = cnxString;
         }
 
         #endregion
@@ -51,7 +47,7 @@ namespace ServerExplorer.UI
             {
                 // Obtener el nombre de la tabla destino
                 string destTable = Microsoft.VisualBasic.Interaction.InputBox("Nombre de la tabla destino", "tabla destino", String.Empty,
-                    this.Top + (this.Height / 2), this.Left + (this.Width / 2));
+                    Top + (Height / 2), Left + (Width / 2));
 
                 DataTable dt = GenerarInserts(destTable);
                 dgvDatos.DataSource = dt;
@@ -79,16 +75,12 @@ namespace ServerExplorer.UI
 
         private DataTable Exec()
         {
-            SqlConnection cnx;
-            DataTable dt;
-            SqlDataAdapter da;
-
             // Establecer conexion
-            cnx = new SqlConnection(cnxString);
+            var cnx = new SqlConnection(_cnxString);
 
             // Obtener resultado en un datatable.
-            da = new SqlDataAdapter(txtCommand.Text, cnx);
-            dt = new DataTable();
+            var da = new SqlDataAdapter(txtCommand.Text, cnx);
+            var dt = new DataTable();
             cnx.Open();
             da.Fill(dt);
             cnx.Close();
@@ -98,14 +90,12 @@ namespace ServerExplorer.UI
 
         private DataTable GenerarInserts(string destTable)
         {
-            DataTable dataTable = new DataTable();
-            DataTable destDataTable;
-            NumberFormatInfo nfi = new NumberFormatInfo { NumberDecimalSeparator = "." };
+            var nfi = new NumberFormatInfo { NumberDecimalSeparator = "." };
 
-            dataTable = Exec();
+            DataTable dataTable = Exec();
 
             // Preparar la datatable destino
-            destDataTable = new DataTable();
+            var destDataTable = new DataTable();
             destDataTable.Columns.Add("Comando", typeof(String));
 
             // Recorrer la tabla de datos