Custom Assembly Attributes

问题

I would like to know if I can define custom assembly attributes. Existing attributes are defined in the following way:

[assembly: AssemblyTitle(\"MyApplication\")]  
[assembly: AssemblyDescription(\"This application is a sample application.\")]  
[assembly: AssemblyCopyright(\"Copyright © MyCompany 2009\")]  

Is there a way I can do the following:

[assembly: MyCustomAssemblyAttribute(\"Hello World! This is a custom attribute.\")]

回答1:

Yes you can. We do this kind of thing.

[AttributeUsage(AttributeTargets.Assembly)]
public class MyCustomAttribute : Attribute {
    string someText;
    public MyCustomAttribute() : this(string.Empty) {}
    public MyCustomAttribute(string txt) { someText = txt; }
    ...
}

To read use this kind of linq stmt.

var attributes = assembly
    .GetCustomAttributes(typeof(MyCustomAttribute), false)
    .Cast<MyCustomAttribute>();

回答2:

Yes, use AttributeTargets.Assembly:

[AttributeUsage(AttributeTargets.Assembly)]
public class AssemblyAttribute : Attribute { ... }

来源：https://stackoverflow.com/questions/1936953/custom-assembly-attributes