Extract TrackingTextReader from CsvIndexer.

Code/CsvIndexer.cs

@@ -51,38 +51,11 @@ namespace CsvView.Code
             }
         }
 
-        private class TrackingTextReader : TextReader
-        {
-            private readonly TextReader _baseReader;
-            private int _position;
-
-            public TrackingTextReader(TextReader baseReader)
-            {
-                _baseReader = baseReader;
-            }
-
-            public override int Read()
-            {
-                _position++;
-                return _baseReader.Read();
-            }
-
-            public override int Peek()
-            {
-                return _baseReader.Peek();
-            }
-
-            public int Position
-            {
-                get { return _position; }
-            }
-        }
-
         public void GenerateIndex(string file)
         {
             _insideString = false;
             _index.Clear();
-            FileStream stream = new FileStream(file, FileMode.Open);
+            using (FileStream stream = new FileStream(file, FileMode.Open))
             using (StreamReader streamReader = new StreamReader(stream, Encoding.Default, true, 4096))
             using (TrackingTextReader reader = new TrackingTextReader(streamReader))
             {
@@ -100,7 +73,6 @@ namespace CsvView.Code
                     }
                 }
             }
-            stream.Close();
         }
 
         private void Index_SaveFile(string indexFile)
@@ -123,7 +95,7 @@ namespace CsvView.Code
 
         private static List<long> Index_LoadFile(string indexFile)
         {
-            var tempIndex = new List<long>();
+            List<long> tempIndex = new List<long>();
 
             Stream streamIn = File.Open(indexFile, FileMode.Open);
             using (BinaryReader binReader = new BinaryReader(streamIn))
@@ -142,7 +114,7 @@ namespace CsvView.Code
         public void LoadIndexOfFile(string file)
         {
             DateTime dtFile = File.GetCreationTime(file);
-            string indexFile = file + ".idx";
+            string indexFile = $"{file}.idx";
             if (File.Exists(indexFile) && File.GetCreationTime(indexFile) > dtFile)
             {
                 _index = Index_LoadFile(indexFile);

Code/TrackingTextReader.cs

@@ -0,0 +1,37 @@
+using System;
+using System.IO;
+
+namespace CsvView.Code
+{
+    public class TrackingTextReader : TextReader
+    {
+        private readonly TextReader _baseReader;
+        private int _position;
+
+        public TrackingTextReader(TextReader baseReader)
+        {
+            _baseReader = baseReader;
+        }
+
+        public override int Read()
+        {
+            _position++;
+            return _baseReader.Read();
+        }
+
+        public override int Read(char[] buffer, int index, int count)
+        {
+            throw new NotImplementedException("Read buffered method on TrackingTextReader");
+        }
+
+        public override int Peek()
+        {
+            return _baseReader.Peek();
+        }
+
+        public int Position
+        {
+            get { return _position; }
+        }
+    }
+}

CsvView.csproj

@@ -66,6 +66,7 @@
   <ItemGroup>
     <Compile Include="Code\CsvIndexer.cs" />
     <Compile Include="Code\CsvParser.cs" />
+    <Compile Include="Code\TrackingTextReader.cs" />
     <Compile Include="UI\CTextBox.cs">
       <SubType>Component</SubType>
     </Compile>

UI/FrmCsvViewer.cs

@@ -51,7 +51,7 @@ namespace CsvView.UI
             _loadedFile = fileName;
             txtPath.Text = fileName;
 
-            var csvIndexer = new CsvIndexer();
+            CsvIndexer csvIndexer = new CsvIndexer();
             csvIndexer.LoadIndexOfFile(_loadedFile);
             _index = csvIndexer.Index;
             _totalRegs = _index.Count - 1;
@@ -108,16 +108,16 @@ namespace CsvView.UI
             List<string> currentData = Index_LoadReg((int)currentReg);
 
             int y = 0;
-            const int TexboxPadding = 5;
-            const int PaddingLeft = 0;
-            const int PaddingRight = 0;
-            const int PaddingBetween = 10;
-            const int LineHeight = 15;
+            const int textBoxPadding = 5;
+            const int paddingLeft = 0;
+            const int paddingRight = 0;
+            const int paddingBetween = 10;
+            const int lineHeight = 15;
             for (int i = 0; i < currentData.Count; i++)
             {
-                TextBox txtValue = RenderValue(currentData[i], y, TexboxPadding, PaddingLeft, PaddingRight, LineHeight);
+                TextBox txtValue = RenderValue(currentData[i], y, textBoxPadding, paddingLeft, paddingRight, lineHeight);
                 pnlData.Controls.Add(txtValue);
-                y += txtValue.Height + PaddingBetween;
+                y += txtValue.Height + paddingBetween;
             }
             pnlData.Height = y;
 
@@ -125,17 +125,17 @@ namespace CsvView.UI
             _rendering = false;
         }
 
-        private TextBox RenderValue(string value, int y, int TexboxPadding, int PaddingLeft, int PaddingRight, int LineHeight)
+        private TextBox RenderValue(string value, int y, int textBoxPadding, int paddingLeft, int paddingRight, int lineHeight)
         {
             string[] valueLines = value.Split('\n');
             CTextBox txtValue = new CTextBox()
             {
                 Anchor = (AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right),
-                Width = pnlData.Width - (PaddingLeft + PaddingRight),
-                Height = (valueLines.Length * LineHeight) + TexboxPadding,
+                Width = pnlData.Width - (paddingLeft + paddingRight),
+                Height = (valueLines.Length * lineHeight) + textBoxPadding,
                 Multiline = (valueLines.Length > 1),
                 Top = y,
-                Left = PaddingLeft,
+                Left = paddingLeft,
                 ReadOnly = true,
             };
             for (int j = 0; j < valueLines.Length; j++)