Add missing csharp unittesting info pointers

docs/README.plugins.md

@@ -23,7 +23,7 @@ Curated plugins of related prompts, agents, and skills organized around specific
 | [cast-imaging](../plugins/cast-imaging/README.md) | A comprehensive collection of specialized agents for software analysis, impact assessment, structural quality advisories, and architectural review using CAST Imaging. | 3 items | cast-imaging, software-analysis, architecture, quality, impact-analysis, devops |
 | [clojure-interactive-programming](../plugins/clojure-interactive-programming/README.md) | Tools for REPL-first Clojure workflows featuring Clojure instructions, the interactive programming chat mode and supporting guidance. | 3 items | clojure, repl, interactive-programming |
 | [context-engineering](../plugins/context-engineering/README.md) | Tools and techniques for maximizing GitHub Copilot effectiveness through better context management. Includes guidelines for structuring code, an agent for planning multi-file changes, and prompts for context-aware development. | 5 items | context, productivity, refactoring, best-practices, architecture |
-| [csharp-dotnet-development](../plugins/csharp-dotnet-development/README.md) | Essential prompts, instructions, and chat modes for C# and .NET development including testing, documentation, and best practices. | 8 items | csharp, dotnet, aspnet, testing |
+| [csharp-dotnet-development](../plugins/csharp-dotnet-development/README.md) | Essential prompts, instructions, and chat modes for C# and .NET development including testing, documentation, and best practices. | 11 items | csharp, dotnet, aspnet, testing |
 | [csharp-mcp-development](../plugins/csharp-mcp-development/README.md) | Complete toolkit for building Model Context Protocol (MCP) servers in C# using the official SDK. Includes instructions for best practices, a prompt for generating servers, and an expert chat mode for guidance. | 3 items | csharp, mcp, model-context-protocol, dotnet, server-development |
 | [database-data-management](../plugins/database-data-management/README.md) | Database administration, SQL optimization, and data management tools for PostgreSQL, SQL Server, and general database development best practices. | 8 items | database, sql, postgresql, sql-server, dba, optimization, queries, data-management |
 | [dataverse-sdk-for-python](../plugins/dataverse-sdk-for-python/README.md) | Comprehensive collection for building production-ready Python integrations with Microsoft Dataverse. Includes official documentation, best practices, advanced features, file operations, and code generation prompts. | 17 items | dataverse, python, integration, sdk |

plugins/csharp-dotnet-development/.github/plugin/plugin.json

@@ -42,6 +42,18 @@
       "path": "prompts/csharp-xunit.prompt.md",
       "kind": "prompt"
     },
+    {
+      "path": "prompts/csharp-nunit.prompt.md",
+      "kind": "prompt"
+    },
+    {
+      "path": "prompts/csharp-mstest.prompt.md",
+      "kind": "prompt"
+    },
+    {
+      "path": "prompts/csharp-tunit.prompt.md",
+      "kind": "prompt"
+    },
     {
       "path": "prompts/dotnet-best-practices.prompt.md",
       "kind": "prompt"

plugins/csharp-dotnet-development/README.md

@@ -18,6 +18,9 @@ copilot plugin install csharp-dotnet-development@awesome-copilot
 | `/csharp-dotnet-development:csharp-async` | Get best practices for C# async programming |
 | `/csharp-dotnet-development:aspnet-minimal-api-openapi` | Create ASP.NET Minimal API endpoints with proper OpenAPI documentation |
 | `/csharp-dotnet-development:csharp-xunit` | Get best practices for XUnit unit testing, including data-driven tests |
+| `/csharp-dotnet-development:csharp-nunit` | Get best practices for NUnit unit testing, including data-driven tests |
+| `/csharp-dotnet-development:csharp-mstest` | Get best practices for MSTest 3.x/4.x unit testing, including modern assertion APIs and data-driven tests |
+| `/csharp-dotnet-development:csharp-tunit` | Get best practices for TUnit unit testing, including data-driven tests |
 | `/csharp-dotnet-development:dotnet-best-practices` | Ensure .NET/C# code meets best practices for the solution/project. |
 | `/csharp-dotnet-development:dotnet-upgrade` | Ready-to-use prompts for comprehensive .NET framework upgrade analysis and execution |