UUID in C#: System.Guid Guide for .NET Developers
Generate and manipulate GUIDs in C# with System.Guid. Covers Guid.NewGuid(), parsing, formatting, and storing GUIDs in SQL Server and EF Core.
Published:
Tags: developer-tools, uuid, csharp
UUID in C#: System.Guid Guide for .NET Developers .NET calls them GUIDs (Globally Unique Identifiers) but they are the same as UUIDs — 128-bit identifiers compliant with RFC 4122. has been in .NET since v1.0 and received significant improvements in .NET 9, including v7 support. Guid.NewGuid() — Random v4 The primary method. Calls the OS CSPRNG via on Windows or on Linux/macOS. Thread-safe. Each call is independent. --- Guid.Empty — The Zero GUID --- ToString() Format Strings accepts five format specifiers: | Format | Output Shape | Common Use | |--------|-------------|-----------| | | | Default, most interoperable | | | | Compact storage, URLs | | | | COM/Windows registry | | | | Legacy Windows APIs | | | Hex struct | Rare, internal COM | --- Parsing: Guid.Parse() and Guid.TryParse()…
All articles · theproductguy.in