feat: add error handling for Percy support and include C# Selenium instructions

Author: ruturaj-browserstack

src/tools/bstack-sdk.ts

@@ -55,6 +55,10 @@ export async function bootstrapProjectWithSDK({
       );
       if (percyInstructions) {
         instructions += formatPercyInstructions(percyInstructions);
+      } else {
+        throw new Error(
+          `Percy is currently not supported through MCP for ${detectedLanguage} with ${detectedTestingFramework}. If you want to run the test cases without Percy, disable Percy and run it again.`,
+        );
       }
     }
     return {
@@ -91,7 +95,9 @@ export async function bootstrapProjectWithSDK({
     if (percyInstructions) {
       fullInstructions += formatPercyInstructions(percyInstructions);
     } else {
-      fullInstructions += `\n\nNote: Percy SDK instructions for ${detectedLanguage} with ${detectedTestingFramework} are not yet available through this tool. Please refer to the official BrowserStack Percy documentation.`;
+      throw new Error(
+        `Percy is currently not supported through MCP for ${detectedLanguage} with ${detectedTestingFramework}. If you want to run the test cases without Percy, disable Percy and run it again.`,
+      );
     }
   }
 

src/tools/sdk-utils/percy/constants.ts

@@ -110,6 +110,38 @@ describe("My WebdriverIO Test", () => {
 \`\`\`
 `;
 
+const csharpSeleniumInstructions = `
+To manually capture screenshots alongside the auto mode, implement the following steps in your test script:
+
+1. **Import the BrowserStack Percy SDK** in your test script.
+2. Add the \`PercySDK.Screenshot(driver, name)\` method at required points in your test script to get the screenshots you want.
+
+Here's an example:
+
+\`\`\`csharp
+using BrowserStackSDK.Percy;
+using NUnit.Framework;
+
+namespace Tests;
+
+public class MyTest
+{
+    [Test]
+    public void SampleTest()
+    {
+        // your test logic
+        // ...
+        
+        // Capture a Percy screenshot
+        PercySDK.Screenshot(driver, "Screenshot name");
+        
+        // ...
+        // more test logic
+    }
+}
+\`\`\`
+`;
+
 export const PERCY_INSTRUCTIONS: PercyConfigMapping = {
   java: {
     selenium: {
@@ -119,6 +151,11 @@ export const PERCY_INSTRUCTIONS: PercyConfigMapping = {
       junit5: { script_updates: javaSeleniumInstructions },
     },
   },
+  csharp: {
+    selenium: {
+      nunit: { script_updates: csharpSeleniumInstructions },
+    },
+  },
   nodejs: {
     selenium: {
       mocha: {