C# DEVELOPMENT
Converting from Visual Basic .NET to C#
Clive Chinery
04.21.2004
Rating: -4.60- (out of 5)
This tip provides tips you can use when converting code from VB .NET to C#, if you learned the languages in that order.
Assuming you took Dan Appleman's advice and learned Visual Basic .NET before learning C#, here are the things I wish someone had told me instead of having to learn it the hard way.
- C# is case-sensitive. Thus although both "if" and "If" are valid in VB.NET, only "if" is valid in C#.
- Visual Basic .NET uses "=" for both equality and assignment whereas C# uses "==" for equality and "=" for assignment.
- C# uses the ";" to denote the end of a statement and thus does not need a line continuation character.
- C# uses braces, "{" and "}", to denote blocks of code.
- In C#, everything after "//" is a comment. Multiple lines can be commented out with "/* ..... */".
- C# distinguishes between a char (a single byte) and a string. The literals for each are shown here:
char cFred = 'F'; // character assignment
string strFred = "Fred"; // string assignment
- Brackets around conditions are mandatory in C#, thus the VB.NET fragment of code:
If intFred = 1 Then
strFred = "Fred is 1"
End If
becomes in C#
if (intFred == 1)
{
strFred = "Fred is 1";
}
- The logical "And" and "Or" in Visual Basic .NET become just "&" and "|", thus:
If (intFred = 1) Or (intFred = 2) Then
strFred = "Fred is 1 or 2";
End If
becomes in C#:
if ((intFred == 1) | (intFred == 2)) // notice the second layer of (..)
{
strFred = "Fred is 1 or 2";
}
- Whereas in Visual Basic .NET, strings can be concatenated by "+" or "&", in C#, concatenation is "+" only.
The only C# book I have needed is C# in a Nutshell from O'Reilly (ISBN 0-596-00526-1).
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