The CLS (Common Language Specification) is a set of constraints on APIs and a complementary set of requirements on languages. If a library is CLS-compliant (i.e. adheres to all the constraints), then any CLS-compliant language can use that API. Conversely, a CLS-compliant language is guaranteed to be able to use any CLS-compliant library. (Int32 is an example of a CLS-compliant type, so CLS guarantees it's safe for library writers to use it in their APIs.)
Questions tagged [cls-compliant]
103 questions
244
votes
17 answers
A definitive guide to API-breaking changes in .NET
I would like to gather as much information as possible regarding API versioning in .NET/CLR, and specifically how API changes do or do not break client applications. First, let's define some terms:
API change - a change in the publicly visible…
Pavel Minaev
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194
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5 answers
What is the 'CLSCompliant' attribute in .NET?
What is the CLSCompliant attribute?
Praveen Sharma
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123
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4 answers
Why are unsigned int's not CLS compliant?
Why are unsigned integers not CLS compliant?
I am starting to think the type specification is just for performance and not for correctness.
doekman
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78
votes
4 answers
Why should I write CLS compliant code?
I've found a lot of pages about CLS compliance.
I've understood that CLS compliance:
Is a way to guarantee different assembly compatibility.
Is a way to declare the high security code
Many peolple write that "if you write code, you should write it…
Luca
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56
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8 answers
Why is this name with an underscore not CLS Compliant?
Why do I get the compiler warning
Identifier 'Logic.DomainObjectBase._isNew' is not CLS-compliant
for the following code?
public abstract class DomainObjectBase
{
protected bool _isNew;
}
MatthewMartin
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42
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4 answers
Base type is not CLS-compliant, what reasons of this warning?
I have got warning from subject on one of my classes. Actually class is very simple, just an inheritor of my generic base type. Also I have some other inheritors from that generic class across the solution, and there are no such warnings.
What could…
DarkDeny
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2 answers
Setting CLS compliance for a .NET assembly
Setting CLS compliance for an entire .NET assembly is possible. But how is it actually done? E.g. with Visual Studio 2008?
Peter Mortensen
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31
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3 answers
Is the new feature of C# 4.0 - "Optional Parameters" CLS-Compliant?
This new feature is really convenient.
Lately I read the document of the "Microsoft All-In-One Code Framework", and it mentions that "Optional Parameters" is not CLS-Compliant.
So I tested it by using "Optional Parameters" in a public API, and…
Cui Pengfei 崔鹏飞
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29
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3 answers
CLSCompliant(true) drags in unused references
Can anyone explain the following behavior?
In summary, if you create multiple CLS compliant libraries in Visual Studio 2008 and have them share a common namespace root, a library referencing another library will require references to that library's…
Mark Seemann
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20
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How to mark .NET Standard code as CLS-compliant?
The title says it all - how do I flag a .NET standard library as CLS-compliant?
I wrote a simple library in C# targeting .NET Standard 1.0 framework. It includes two enums:
public enum Alignments { Left, Center, Right }
public enum Actions { None,…
Quango
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2 answers
CA1014 Mark 'some.dll' with CLSCompliant(true) error message with StyleCop of VS2010
When I run StyleCop, I got this error message saying that I need to Mark the dll with CLSCompliant(true).
What is this? How can I set the Mark the dll with CLSCompliant(true)?
Error 4 CA1014 : Microsoft.Design :
Mark 'SOMETHING.dll' with…
prosseek
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15
votes
1 answer
Why is my function not CLS-compliant?
I'm getting the following warning message...
Return type of function 'ConnectionNew' is not CLS-compliant.
...for this function:
Public Function ConnectionNew(ByVal DataBaseName As String) As MySqlConnection
Dim connection As…
Urbycoz
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13
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2 answers
What are the consequences of NON-CLS Compliant code in .NET?
I have a couple of nagging compiler warnings for an app that I ported from VB6 a while back regarding CLS-Compliance including:
Name '_AnIdentifier' is not CLS-Compliant.
Type of parameter 'myType' is not CLS-Compliant.
Despite this, my app seems…
JohnFx
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12
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3 answers
Why does Stream.Write not take a UInt?
It seems highly illogical to me that Stream.Write uses int, instead of UInt... Is there an explanation other than "legacy" code for this fact? Would any one want to write -1 bytes?!?
Leonardo
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4 answers
C#: Nonzero-based arrays are not CLS-compliant
I am currently reading Albahari's C# 3.0 in a Nutshell and on pg. 241, whilst talking about Array indexing, he says this:
Nonzero-based arrays are not
CLS (Common Language Specification)-compliant
What does it mean exactly, for nonzero arrays…
Andreas Grech
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