扩展方法作为静态类方法
可能的重复：
您可以添加像静态一样调用的扩展方法吗方法？
我想在 Guid 系统类型上添加 NewSequentialGuid 函数，这样我就可以使用如下内容：
Id = Guid.NewSequentialGuid()
namespace MyExtensions
{
public static class GuidExtensions
{
[DllImport("rpcrt4.dll", SetLastError = true)]
static extern int UuidCreateSequential(out Guid guid);
public static Guid NewSequentialGuid(this Guid guid)
{
const int RPC_S_OK = 0;
Guid g;
int hr = UuidCreateSequential(out g);
if (hr != RPC_S_OK)
throw new ApplicationException
("UuidCreateSequential failed: " + hr);
return g;
}
}
}
但我不能让它工作，它只适用于实例变量，知道如何将其作为静态方法添加到扩展类中吗？
Possible Duplicate:
Can you add extension methods that you call like static methods?
I would like to add NewSequentialGuid function on the Guid system type, so I can use like following:
Id = Guid.NewSequentialGuid()
namespace MyExtensions
{
public static class GuidExtensions
{
[DllImport("rpcrt4.dll", SetLastError = true)]
static extern int UuidCreateSequential(out Guid guid);
public static Guid NewSequentialGuid(this Guid guid)
{
const int RPC_S_OK = 0;
Guid g;
int hr = UuidCreateSequential(out g);
if (hr != RPC_S_OK)
throw new ApplicationException
("UuidCreateSequential failed: " + hr);
return g;
}
}
}
But I cannot get this to work, it only works with instance variables, any idea how to add this to extended class as a static method?
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你不能。
它们被创建为看起来像实例方法，并且不能用作类（静态）方法。
来自 MSDN：
和：
You can't.
They were created to look like instance methods and can't be make to work as class (static) methods.
From MSDN:
And:
您可以添加像静态一样调用的扩展方法吗方法？
Can you add extension methods that you call like static methods?