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    <p>I was looking for a general way to solve this problem instead of focusing on just EBCDIC 37, and I didn't want to visually compare two charts of codes. I wrote a short program (in VB.NET) to find all of the characters that exist in one codepage and not the other.</p> <pre><code>' Pick source and target codepages. Dim sourceEncoding As Encoding = Encoding.Default ' This is Windows 1252 on Windows OS. Dim targetEncoding As Encoding = Encoding.GetEncoding("IBM037") ' Get every character in the codepage. Dim inbytes(256) As Byte For code As Integer = 0 To 255 inbytes(code) = Convert.ToByte(code) Next ' Convert the bytes from the source encoding to the target, then back again. ' Those bytes that convert back to the original value exist in both codepages. ' The bytes that change do not exist in the target encoding. Dim input As String = sourceEncoding.GetString(inbytes) Dim outbytes As Byte() = Encoding.Convert(sourceEncoding, targetEncoding, inbytes) Dim convertedbytes As Byte() = Encoding.Convert(targetEncoding, sourceEncoding, outbytes) Dim output As String = sourceEncoding.GetString(convertedbytes) Dim diffs As New List(Of Char)() For idx As Integer = 0 To input.Length - 1 If input(idx) &lt;&gt; output(idx) Then diffs.Add(input(idx)) End If Next ' Print results. Console.WriteLine("Source: " + input) Console.WriteLine("(Coded): " + String.Join(" ", inbytes.Select(Function (x) Convert.ToInt32(x).ToString()).ToArray())) Console.WriteLine() Console.WriteLine("Target: " + output) Console.WriteLine("(Coded): " + String.Join(" ", convertedbytes.Select(Function (x) Convert.ToInt32(x).ToString()).ToArray())) Console.WriteLine() Console.WriteLine("Cannot convert: " + String.Join(" ", diffs.Select(Function (x) Convert.ToInt32(x).ToString()).ToArray())) </code></pre> <p>For the case of Windows 1252 to EBCDIC 37, there are 27 characters that do not map. I chose what I thought was the best equivalent for those characters.</p>
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    1. POIn .NET, how do I determine what characters existing in the Windows 1252 codepage do not exist in EBCDIC 37 codepage?
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