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The following C# code 

   String Test = "My Test\n" ;

converts to VB.NET

   Dim Test As String = "My Test" & Chr(10) & "" 

and back to C#

   string Test = "My Test" + Strings.Chr(10) + ""; 

I think the code could be optimized by replacing escape sequences in the converted VB.NET code with their constants like vbLF, vbNewline etc. and vice versa.

Also the empty string can be either removed completely or replaced with the faster String.Empty.

string.Empty is not faster than "", if you look at the generated native code you'll see that both compile to a single MOV instruction. There are a lot of myths about the performance of string operations in .NET that are simply not true (especially common myth: "StringBuilder is faster than +").

The converter should not create any empty string literals; and you're right that constants should be preferred when they exist (are there constants for \0, \v, \b, \f, \a ?)

You're certainly right with the string performance. I 'converted' that knowledge from VB6, got used to replace "" with vbNullString etc. and have not checked again with .NET.

I knew of constants for Chr(8) up to Chr(13) and some combinations. Chr(0) is vbNullChar.

 Implemented in revision 3022.