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    <p>If I understand correctly: What you are looking for is a tool that controls the compilation by your attributes. You may check if stylecop or fxcop fit your needs. Alternatively you might extend Visual Studio to access the source code model. An extension may check the source code (see <a href="http://blogs.msdn.com/b/sqlserverstorageengine/archive/2007/03/02/using-visual-studio-s-code-model-objects-for-code-base-understanding.aspx" rel="nofollow">http://blogs.msdn.com/b/sqlserverstorageengine/archive/2007/03/02/using-visual-studio-s-code-model-objects-for-code-base-understanding.aspx</a>), evaluates the attributes and generate compiler warnings, errors whatever you like.</p> <p>===================================</p> <h1>Original Answer:</h1> <p>Answer: You just have to provide the corresponding constructor</p> <pre><code>[AttributeUsage(AttributeTargets.All)] public class HelpAttribute : System.Attribute { // Required parameter public HelpAttribute(string url) { this.Url = url; } // Optional parameter public string Topic { get; set; } public readonly string Url; } public class Whatever { [Help("http://www.stackoverflow.com")] public int ID { get; set; } [Help("http://www.stackoverflow.com", Topic="MyTopic")] public int Wew { get; set; } // [Help] // without parameters does not compile public int Wow { get; set; } } </code></pre> <p>The allowed parameter types are liste at MSDN: <a href="http://msdn.microsoft.com/en-us/library/aa664615(v=vs.71).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/aa664615(v=vs.71).aspx</a></p> <p>Further reading: <a href="http://msdn.microsoft.com/en-us/library/aa288454(v=vs.71).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/aa288454(v=vs.71).aspx</a></p>
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    1. POCreating custom attributes for methods that has specific signature
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    1. POCreating custom attributes for methods that has specific signature
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    1. COSorry for my bad English. On my question I was trying to ask is: When I make attribute, that attribute must force method to have specific signature. I am not worried about attribute's constructor(signature). In the example you gave me is: string url is a required parameter and Topic is named parameter. Here is example: When I use Help attribute on my method, that Help attribute must force method to have string and int parameter.
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    2. COLet me try to rewrite your question: Is it possible to write an Attribute to control a method`s signature?
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    3. COThat sounds right.
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