C # class definition unknown

Question

I am looking at C # code and I can see what I cannot find next to the class definition. Here is an example of what I see.

[MethodImpl(MethodImplOptions.Synchronized)] public void AddTag(RTag tag) { this.tags.Add(tag) } 

What the hell is the first line that makes or states? I could not track it in any of my directories.

Thanks!

Answer 1

The first line is the attribute, that is, the metadata associated with the method.

MethodImplAttribute defines the details of how the method is implemented. In particular, MethodImplOptions.Synchronized

Indicates that a method can execute only one thread at a time. Static methods block a type, while instance methods block an instance. Only one thread can execute in any of the instance functions, and only one thread can execute in any of the class's static functions.

Answer 2

Before I point you to the documentation for the class, a hint when viewing such attributes, and this is an attribute:

 [SomeName] 

or

 [SomeName(...)] 

then usually the actual class name of SomeNameAttribute . When using attributes, if the class name ends with Attribute , you can leave this ending.

The appropriate class for your example is most likely MethodImplAttribute , although I see that you may have been mistaken, L

Answer 3

It marks the method in such a way that it can only be called from one method at a time:

http://msdn.microsoft.com/en-us/library/system.runtime.compilerservices.methodimploptions(VS.71).aspx

This is equivalent to making a lock at the beginning of the method and releasing the lock at the end of the method.

Answer 4

[MethodImp (methodImpOptions.Synchronized)] This is the attribute that applies to the method ... it is probably defined in the reference library.