Update Reflection.Emit docs to clarify framework support

[gewarren]

Fixes #50740.

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docs/csharp/advanced-topics/reflection-and-attributes/index.md	Attributes
docs/framework/app-domains/how-to-load-assemblies-into-an-application-domain.md	How to: Load Assemblies into an Application Domain
docs/framework/app-domains/index.md	"Programming with Application Domains and Assemblies"
docs/framework/app-domains/use.md	Using Application Domains
docs/framework/reflection-and-codedom/reflection-for-windows-store-apps.md	Reflection in the .NET Framework for Windows Store Apps
docs/framework/reflection-and-codedom/toc.yml	docs/framework/reflection-and-codedom/toc
docs/fundamentals/reflection/dynamically-loading-and-using-types.md	Dynamically load and use types
docs/fundamentals/reflection/get-type-member-information.md	"How to: Get type and member information by using reflection"
docs/fundamentals/reflection/how-to-define-a-generic-method-with-reflection-emit.md	How to: Define a generic method with reflection emit (.NET Framework)
docs/fundamentals/reflection/how-to-define-a-generic-type-with-reflection-emit.md	docs/fundamentals/reflection/how-to-define-a-generic-type-with-reflection-emit
docs/fundamentals/reflection/how-to-examine-and-instantiate-generic-types-with-reflection.md	How to: Examine and instantiate generic types with reflection
docs/fundamentals/reflection/how-to-hook-up-a-delegate-using-reflection.md	How to: Hook up a delegate using reflection
docs/fundamentals/reflection/overview.md	Reflection in .NET
docs/fundamentals/runtime-libraries/system-reflection-emit-persistedassemblybuilder.md	System.Reflection.Emit.PersistedAssemblyBuilder class
docs/fundamentals/toc.yml	docs/fundamentals/toc
docs/standard/assembly/inspect-contents-using-metadataloadcontext.md	How to: Inspect assembly contents using MetadataLoadContext
docs/visual-basic/language-reference/error-messages/type-of-member-membername-is-not-cls-compliant.md	"Type of member '' is not CLS-compliant"
docs/visual-basic/language-reference/error-messages/underlying-type-typename-of-enum-is-not-cls-compliant.md	BC40032: Underlying type <typename> of Enum is not CLS-compliant
docs/visual-basic/programming-guide/concepts/reflection.md	docs/visual-basic/programming-guide/concepts/reflection

[Copilot]

Pull request overview

This pull request updates Reflection.Emit documentation to clarify .NET Framework vs. modern .NET support. The main changes rename reflection.md to overview.md and add important notices to reflection emit how-to articles indicating they show .NET Framework-specific APIs not available in modern .NET.

Changes:

• Renamed docs/fundamentals/reflection/reflection.md to overview.md with redirect configuration
• Added important notices to reflection emit how-to articles clarifying .NET Framework-only support
• Updated cross-references throughout documentation from reflection.md to overview.md
• Added new C# code snippets for generic type instantiation and updated existing reflection emit samples
• Modernized code syntax (collection expressions, target-typed new, improved formatting)
• Updated table formatting in dynamically-loading-and-using-types.md

Reviewed changes

Copilot reviewed 24 out of 29 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
docs/fundamentals/reflection/overview.md	Renamed from reflection.md (frontmatter cleanup)
docs/fundamentals/reflection/how-to-define-a-generic-type-with-reflection-emit.md	Added .NET Framework-only notice, updated title, and modernized content structure
docs/fundamentals/reflection/how-to-define-a-generic-method-with-reflection-emit.md	Added .NET Framework-only notice and updated title
docs/fundamentals/reflection/how-to-examine-and-instantiate-generic-types-with-reflection.md	Updated code snippet references to new directory structure
docs/fundamentals/reflection/snippets/csharp/instantiate-generic-type/*	New code samples demonstrating generic type instantiation
docs/fundamentals/reflection/snippets/csharp/emit-generic-type/*	Modernized existing code with new C# syntax features
docs/fundamentals/reflection/snippets/csharp/construct-generic-method/*	New complete code sample for generic method construction
docs/fundamentals/runtime-libraries/system-reflection-emit-persistedassemblybuilder.md	Minor wording improvements for clarity
docs/fundamentals/reflection/dynamically-loading-and-using-types.md	Improved table formatting with code formatting for type names
Multiple cross-reference files	Updated links from reflection.md to overview.md
.openpublishing.redirection.fundamentals.json	Added redirect rule for renamed file

[BillWagner]

This LGTM, but we should point out the use of an unsupported scenario.