How to add UInt128 structure, constructor, properties and methods to my VS2022 C# program?

rich beck 20

I have found System.Numerics.BigInteger and that works great in my C# and VB.net code;

But i see no reference or option to include the UInt128 structure and class; is it in a reference type that I need to include? It is not listed as an option under System.Numerics

Jiale Xue - MSFT 43,046 Reputation points Microsoft Vendor

2023-07-25T02:42:12.39+00:00

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P a u l 10,496 Reputation points

2023-07-24T16:31:16.6566667+00:00

It's in the System namespace, so provided that you're using "implicit usings" then you shouldn't need to include anything.

Are you using .NET 7/8? Currently it looks like the is only supported in those versions:

https://learn.microsoft.com/en-us/dotnet/api/system.uint128?view=net-7.0#applies-to
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rich beck 20 Reputation points

2023-07-25T14:00:38.4633333+00:00

Paul, thanks for taking a look! I am using VS2022, ver 17.6.3 and Dotnet ver 7.0.306; I'm creating a new Windows Form App for .Net using C# and also more recently VB.Net, then create a simple windows form of 2 textboxes and a result textbox to show the product (in UInt128) of the 2 input textbox values. Then i copy the UInt128 structure sample code into my VB.net project; in VB this is: Public Structure UInt128 Implements IAdditionOperators (Of UInt128, UInt128, UInt128), IAdditiveIdentity(Of UInt128, UInt128), and so on...

But none of these types (IAdditionOperators, IAdditiveIdentify, etc...) are being resolved. The error msg is: BC30002: Type 'IAdditionOperators' is not defined. (I've tried prefixing this with System. and get the same error msg as: Type 'System.IAdditionOperators is not defined.

I'm having the same issue with the C# project when i try to copy in the sample code to define the UInt128 Structure in a similar windows form app for .Net. The sample code for UInt128 for C# and VB i am using is copied from: https://learn.microsoft.com/en-us/dotnet/api/system.uint128?view=net-7.0

I am wondering if the structure, properties, and methods for UInt128 are in a Reference that I need to add to my project? For example, like adding the Reference to: System.Numerics to get BigInteger, and Complex object classes? If it should be resolved implicitly in my new C# or VB. .NET project I am no having luck with that!

v/r,

rich
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How to add UInt128 structure, constructor, properties and methods to my VS2022 C# program?

1 answer