为何会出现在.NET GUID破折号？ [英] Why are there dashes in a .NET GUID?

问题描述

为何会出现在.NET GUID破折号？是否有破折号一个GUID的大多数实现，或者是它只是一个微软的东西？

Why are there dashes in a .NET GUID? Are there dashes in most implementations of a GUID, or is it just a Microsoft thing?

签名，

741ecf77-9c92-4435-8e6b-85975bd13452

741ecf77-9c92-4435-8e6b-85975bd13452

推荐答案

从技术上讲，有一个 GUID 。 GUID是它通常存储在下面的方式一个128位的值（使用C＃这里重新present结构）：

Technically, there are no "dashes" in a GUID. A GUID is a 128-bit value which is usually stored in the following manner (using C# here to represent the structure):

public struct Guid
{
  public ulong Data1;
  public ushort Data2;
  public ushort Data3;
  public fixed byte Data4[8];
}

破折号是在字符串重新presentation一个GUID的的。

破折号是可选的，不需要在字符串再一个GUID的presentation。

The dashes are optional and are not required in a string representation of a GUID.

这是说，有地方安置的短划线，涉及到的GUID是如何历史的原因，以生成的，但历史的语义不再适用。

That said, there are historical reasons as to where the placement of the dashes are, related to how the GUIDs were generated, but that historical semantic no longer applies.

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