chore: added dotnet8 example

Author: aavinash-nr

examples/dotnet/NewrelicExample.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Library</OutputType> <!-- Ensure this is Library -->
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
+    <AWSProjectType>Lambda</AWSProjectType>
+    <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
+    <PublishReadyToRun>true</PublishReadyToRun>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Amazon.Lambda.Core" Version="2.2.0" />
+    <PackageReference Include="Amazon.Lambda.Serialization.SystemTextJson" Version="2.4.0" />
+    <PackageReference Include="Amazon.Lambda.APIGatewayEvents" Version="2.7.0" />
+  </ItemGroup>
+</Project>

examples/dotnet/aws-lambda-tools-defaults.json

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+{
+  "Information": [
+    "This file provides default values for the deployment wizard inside Visual Studio and the AWS Lambda commands added to the .NET Core CLI.",
+    "To learn more about the Lambda commands with the .NET Core CLI execute the following command at the command line in the project root directory.",
+    "dotnet lambda help",
+    "All the command line options for the Lambda command can be specified in this file."
+  ],
+  "profile": "",
+  "region": "",
+  "configuration": "Release",
+  "framework": "net8.0",
+  "function-runtime": "dotnet8",
+  "function-architecture": "x86_64",
+  "function-memory-size": 512,
+  "function-timeout": 30
+}

examples/dotnet/build.sh

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+#!/bin/bash
+
+# Install zip on Debian-based systems
+if [ -f /etc/debian_version ]; then
+  apt -qq update
+  apt -qq -y install zip
+
+  # Install required tools if not installed
+  dotnet tool list -g | grep -q Amazon.Lambda.Tools
+  if [ $? -ne 0 ]; then
+    dotnet tool install -g Amazon.Lambda.Tools
+  fi
+
+  # Ensure the global tools path is accessible
+  export PATH="$PATH:/root/.dotnet/tools"
+fi
+
+dotnet restore
+# update the dotnet framework as per your project and ensure the global tools path is accessible
+dotnet lambda package --configuration Debug --framework net8.0 --output-package newrelic-serverless-dotnet-example.zip

examples/dotnet/handler.cs

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+using Amazon.Lambda.Core;
+using System.Threading.Tasks;
+[assembly: LambdaSerializer(typeof(Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer))]
+
+namespace NewrelicExample;
+
+public class Function
+{
+    public async Task<string> FunctionHandler(ILambdaContext context)
+    {
+        await Task.Delay(1000); // Simulate some async work
+        return "Hello, World!";
+    }
+}