communitytoolkit-guard

name	communitytoolkit-guard
description	USE FOR: Writing concise, consistent guard clauses using CommunityToolkit.Diagnostics for argument validation, null checks, range checks, and string validation in constructors, methods, and factory methods. DO NOT USE FOR: Complex business rule validation (use FluentValidation or Peasy), user-facing form validation with error messages (use DataAnnotations), or replacing domain-level parsing/validation (use Parse Don't Validate pattern).
license	MIT
metadata	{"displayName":"CommunityToolkit Guard","author":"Tyler-R-Kendrick","version":"1.0.0"}
compatibility	["claude","copilot","cursor"]
references	[{"title":".NET Community Toolkit Documentation","url":"https://learn.microsoft.com/en-us/dotnet/communitytoolkit/introduction"},{"title":".NET Community Toolkit GitHub Repository","url":"https://github.com/CommunityToolkit/dotnet"},{"title":"CommunityToolkit.Diagnostics NuGet Package","url":"https://www.nuget.org/packages/CommunityToolkit.Diagnostics"}]

CommunityToolkit Guard

Overview

CommunityToolkit.Diagnostics provides the class, a set of static helper methods for writing concise and performant guard clauses. Guard clauses validate method arguments and invariants at the boundaries of public APIs, constructors, and factory methods. The class throws standard .NET exceptions (, , ) with descriptive messages generated at compile time via . It is part of the .NET Community Toolkit and works with .NET Standard 2.0+, .NET 6+, and all modern .NET platforms.