Question

I want to define User Define Guid in C#. I want to insert this in my Guid object:

dddddddddddddddddddddddddddddddd.

When I do this:

Guid user = "dddddddddddddddddddddddddddddddd";

I get the err: System cannot convert from String to System.Guid. What should I do here?

Answer 1

It sounds like you want:

Guid user = Guid.Parse("dddddddddddddddddddddddddddddddd");

Note that when you print the guid out again, it will be formatted differently:

// Prints dddddddd-dddd-dddd-dddd-dddddddddddd
Console.WriteLine(user);

You could call the Guid(string) constructor instead, but personally I prefer calling the Parse method – it’s more descriptive of what’s going on, and it follows the same convention as int.Parse etc. On the other hand, Guid.Parse was only introduced in .NET 4 – if you’re on an older version of .NET, you’ll need to use the constructor. I believe there are some differences in terms of which values will be accepted by the different calls, but I don’t know the details.