Compiler Error CS1614

“name”不明确的；在“attribute1”和“attribute2”之间。请使用" @attribute”或“attributeAttribute”

编译器遇到了意义不明确的特性指定。

为简便起见，C# 编译器允许将 ExampleAttribute 指定为 [Example]。不过，如果名为 Example 的特性类与 ExampleAttribute 同时存在，则会引起多义性，因为编译器无法判断 [Example] 是指 Example 特性还是指 ExampleAttribute 特性。要解决此问题，请对 Example 特性使用 [@Example]，对 ExampleAttribute 使用 [ExampleAttribute]。

下面的示例生成 CS1614：

// CS1614.cs
using System;

// Both of the following classes are valid attributes with valid
// names (MySpecial and MySpecialAttribute). However, because the lookup
// rules for attributes involves auto-appending the 'Attribute' suffix
// to the identifier, these two attributes become ambiguous; that is,
// if you specify MySpecial, the compiler can't tell if you want
// MySpecial or MySpecialAttribute.

public class MySpecial : Attribute {
   public MySpecial() {}
}

public class MySpecialAttribute : Attribute {
   public MySpecialAttribute() {}
}

class MakeAWarning {
   [MySpecial()] // CS1614
                 // Ambiguous: MySpecial or MySpecialAttribute?
   public static void Main() {
   }

   [@MySpecial()] // This isn't ambiguous, it binds to the first attribute above.
   public static void NoWarning() {
   }

   [MySpecialAttribute()] // This isn't ambiguous, it binds to the second attribute above.
   public static void NoWarning2() {
   }

   [@MySpecialAttribute()] // This is also legal.
   public static void NoWarning3() {
   }
}