c# - 我可以在框架方法上使用 SuppressMessage 吗？

Question

我想实现 CodeContracts 的以下建议:

CodeContracts: MyModule: Method MyModule.MyClass.MyMethod: 
To mask *all* warnings issued like the precondition add the attribute: 

[SuppressMessage("Microsoft.Contracts", "RequiresAtCall-propertyAccessor != null")] 

to the method 

System.Linq.Expressions.Expression.Property(System.Linq.Expressions.Expression,System.Reflection.MethodInfo)

感觉我应该能够使用带有 Target 属性的 SupressMessage 来实现这一点。但是，因为这是一个框架方法，所以我不确定。

//doesn't work
[module: SuppressMessage("Microsoft.Contracts", "RequiresAtCall-propertyAccessor != null", Scope = "Member", Target = "System.Linq.Expressions.Expression.Property(System.Linq.Expressions.Expression,System.Reflection.MethodInfo)", Justification = "This isn't covered by Linq Contracts yet.")]

我如何才能全局抑制此警告，这样我就不必设置基线或抑制所有调用站点警告？

EDIT: The specific usage that requires this measure is:

void mymethod()
{
    var myObserver = new PropertyObserver<MyViewModel>();
    //this line throws the error, within the n => n.Value expression
    myObserver.RegisterHandler(n => n.Value, OnValueChanged);
}

public class PropertyObserver<TPropertySource> where TPropertySource : INotifyPropertyChanged
{
    public PropertyObserver<TPropertySource> RegisterHandler(
        Expression<Func<TPropertySource, object>> expression,
        Action<TPropertySource> handler)
    {
        //what this does is irrelevant; the violation  occurs in the method call
    }
}

//n => n.Value decompiles to the following
public static MemberExpression Property (Expression expression, MethodInfo   propertyAccessor)
{
    //and this line is the message I want to suppress, but it's in the .NET framework.
    ContractUtils.RequiresNotNull(propertyAccessor, "propertyAccessor");
    ValidateMethodInfo(propertyAccessor);
    return Property (expression, GetProperty(propertyAccessor));
}

Answer 1

在对 ranomore 进行更多调查后，代码契约中似乎存在错误。

通过 n => n.Value 访问的类有一个通用的 T Value 属性。如果该类更改为非通用类(具有 object Value)，则警告消失。 (具有 object Value 的泛型类也会发出警告)。

当然，这并没有回答最初的问题，但我认为这样做是不可能的。