C# Equivalent to VB String Methods

The VB string members having direct .NET equivalents include Asc, Chr, Format, GetChar, InStr, LCase, Left, Len, LTrim, Mid, Replace, Right, RTrim, Space, Split, StrComp, Trim, and UCase. Try the Demo Edition of Instant C# for details. In general, you need to be aware that the VB methods usually yield 1-based results, or expect 1-based arguments, while the .NET methods are always 0-based.

For example, the following VB code:
y = Mid(y, 3)
Can be converted to the following C# code:
y = y.Substring(2);

Overview of VB to .NET string method mappings:

LCase and UCase convert to ToLower and ToUpper
Left, Mid, and Right convert to Substring
LTrim, RTrim, and Trim convert to TrimStart, TrimEnd, and Trim
InStr converts to IndexOf
Len converts to Length
Replace converts to Replace

If you need to convert from VB to C# and you are depending on the results being reliable and accurate, then you will want to have Instant C#, the best VB to C# converter, at your fingertips.