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feat(config): Add TOML configuration system with env overrides (Task 1.4, TDD)
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‎src/ClawSharp.Core/Config/ChannelsConfig.cs‎

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namespace ClawSharp.Core.Config;
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/// <summary>Channel configurations for messaging platforms.</summary>
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public class ChannelsConfig
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{
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public TelegramChannelConfig? Telegram { get; set; }
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public DiscordChannelConfig? Discord { get; set; }
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public SlackChannelConfig? Slack { get; set; }
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}
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public class TelegramChannelConfig
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{
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public string? BotToken { get; set; }
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public List<string> AllowedUsers { get; set; } = [];
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public bool UseWebhook { get; set; }
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}
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public class DiscordChannelConfig
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{
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public string? BotToken { get; set; }
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public List<string> AllowedGuilds { get; set; } = [];
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}
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public class SlackChannelConfig
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{
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public string? BotToken { get; set; }
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public string? AppToken { get; set; }
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public string? SigningSecret { get; set; }
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}

‎src/ClawSharp.Core/Config/ClawSharpConfig.cs‎

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namespace ClawSharp.Core.Config;
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/// <summary>Root configuration for ClawSharp.</summary>
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public class ClawSharpConfig
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{
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public string WorkspaceDir { get; set; } = Path.Combine(
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Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".clawsharp", "workspace");
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public string DataDir { get; set; } = Path.Combine(
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Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".clawsharp");
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public string? DefaultProvider { get; set; }
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public string? DefaultModel { get; set; }
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public double DefaultTemperature { get; set; } = 0.7;
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public int MaxContextTokens { get; set; } = 128_000;
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public ProvidersConfig Providers { get; set; } = new();
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public MemoryConfig Memory { get; set; } = new();
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public GatewayConfig Gateway { get; set; } = new();
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public ChannelsConfig Channels { get; set; } = new();
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public SecurityConfig Security { get; set; } = new();
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public HeartbeatConfig Heartbeat { get; set; } = new();
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public TunnelConfig Tunnel { get; set; } = new();
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}

‎src/ClawSharp.Core/Config/GatewayConfig.cs‎

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namespace ClawSharp.Core.Config;
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/// <summary>HTTP gateway settings.</summary>
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public class GatewayConfig
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{
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public string Host { get; set; } = "127.0.0.1";
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public int Port { get; set; } = 8080;
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public bool EnableUi { get; set; } = true;
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public string? ApiKey { get; set; }
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}

‎src/ClawSharp.Core/Config/HeartbeatConfig.cs‎

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namespace ClawSharp.Core.Config;
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/// <summary>Heartbeat polling settings.</summary>
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public class HeartbeatConfig
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{
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public bool Enabled { get; set; } = true;
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public int IntervalSeconds { get; set; } = 1800;
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public string Prompt { get; set; } = "Read HEARTBEAT.md if it exists. If nothing needs attention, reply HEARTBEAT_OK.";
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}

‎src/ClawSharp.Core/Config/MemoryConfig.cs‎

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namespace ClawSharp.Core.Config;
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/// <summary>Memory store settings.</summary>
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public class MemoryConfig
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{
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public string DbPath { get; set; } = "memory.db";
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public bool EnableVectorSearch { get; set; } = true;
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public string? EmbeddingProvider { get; set; }
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public string? EmbeddingModel { get; set; }
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}

‎src/ClawSharp.Core/Config/ProvidersConfig.cs‎

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namespace ClawSharp.Core.Config;
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/// <summary>LLM provider configurations.</summary>
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public class ProvidersConfig
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{
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public ProviderEntry? Openai { get; set; }
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public ProviderEntry? Anthropic { get; set; }
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public ProviderEntry? OpenRouter { get; set; }
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public ProviderEntry? Ollama { get; set; }
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public List<ProviderEntry> Compatible { get; set; } = [];
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}
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/// <summary>A single provider's connection settings.</summary>
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public class ProviderEntry
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{
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public string? ApiKey { get; set; }
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public string? BaseUrl { get; set; }
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public string? DefaultModel { get; set; }
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}

‎src/ClawSharp.Core/Config/SecurityConfig.cs‎

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namespace ClawSharp.Core.Config;
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/// <summary>Security and sandboxing settings.</summary>
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public class SecurityConfig
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{
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public bool SandboxEnabled { get; set; } = true;
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public List<string> AllowedCommands { get; set; } = ["ls", "cat", "grep", "find", "echo", "date"];
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public List<string> AllowedPaths { get; set; } = [];
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public string? PairingSecret { get; set; }
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}

‎src/ClawSharp.Core/Config/TunnelConfig.cs‎

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namespace ClawSharp.Core.Config;
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/// <summary>Tunnel settings for external access.</summary>
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public class TunnelConfig
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{
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public string? Provider { get; set; }
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public string? Token { get; set; }
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public string? Domain { get; set; }
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}

‎src/ClawSharp.Infrastructure/ClawSharp.Infrastructure.csproj‎

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<ProjectReference Include="..\ClawSharp.Core\ClawSharp.Core.csproj" />
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Tomlyn" Version="0.20.0" />
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</ItemGroup>
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<PropertyGroup>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>

‎src/ClawSharp.Infrastructure/Config/TomlConfigLoader.cs‎

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namespace ClawSharp.Infrastructure.Config;
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using ClawSharp.Core.Config;
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using Tomlyn;
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using Tomlyn.Model;
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/// <summary>Loads ClawSharp configuration from TOML files with environment variable overrides.</summary>
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public static class TomlConfigLoader
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{
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/// <summary>
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/// Loads configuration from the specified path, CLAWSHARP_CONFIG_PATH env var, or the default location.
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/// Missing files return default config. Environment variables always take precedence.
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/// </summary>
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public static ClawSharpConfig Load(string? configPath = null)
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{
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configPath ??= Environment.GetEnvironmentVariable("CLAWSHARP_CONFIG_PATH")
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?? Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".clawsharp", "config.toml");
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ClawSharpConfig config;
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if (!File.Exists(configPath))
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{
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config = new ClawSharpConfig();
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}
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else
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{
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var toml = File.ReadAllText(configPath);
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try
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{
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config = Toml.ToModel<ClawSharpConfig>(toml,
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options: new TomlModelOptions
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{
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ConvertPropertyName = name => ToSnakeCase(name),
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});
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}
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catch (TomlException ex)
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{
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throw new InvalidOperationException(
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$"Failed to parse config file '{configPath}': {ex.Message}", ex);
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}
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}
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return ApplyEnvironmentOverrides(config);
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}
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private static ClawSharpConfig ApplyEnvironmentOverrides(ClawSharpConfig config)
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{
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if (Environment.GetEnvironmentVariable("CLAWSHARP_DEFAULT_PROVIDER") is { } provider)
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config.DefaultProvider = provider;
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if (Environment.GetEnvironmentVariable("CLAWSHARP_DEFAULT_MODEL") is { } model)
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config.DefaultModel = model;
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if (Environment.GetEnvironmentVariable("OPENAI_API_KEY") is { } oaiKey)
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(config.Providers.Openai ??= new ProviderEntry()).ApiKey = oaiKey;
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if (Environment.GetEnvironmentVariable("ANTHROPIC_API_KEY") is { } antKey)
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(config.Providers.Anthropic ??= new ProviderEntry()).ApiKey = antKey;
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return config;
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}
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private static string ToSnakeCase(string name)
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{
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var result = new System.Text.StringBuilder();
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for (var i = 0; i < name.Length; i++)
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{
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var c = name[i];
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if (char.IsUpper(c))
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{
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if (i > 0) result.Append('_');
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result.Append(char.ToLowerInvariant(c));
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}
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else
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{
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result.Append(c);
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}
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}
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return result.ToString();
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}
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}

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