public async Task<InvoiceData> ProcessInvoiceAsync(string pdfPath)
{
    var pdfBytes = File.ReadAllBytes(pdfPath);

    // Invoice uploaded to 非常 — banking details included
    var response = await _client.ProcessDocumentAsync(
        fileData: pdfBytes,
        fileName: Path.GetFileName(pdfPath),
        categories: new[] { "invoices" }
    );

    return new InvoiceData
    {
        InvoiceNumber    = response.InvoiceNumber,
        VendorName       = response.Vendor?.Name,
        VendorTaxId      = response.Vendor?.TaxId,       // transmitted
        Total            = response.Total,
        DueDate          = response.DueDate,
        PaymentTerms     = response.PaymentTerms,
        BankAccountNumber = response.BankAccount?.AccountNumber, // transmitted
        BankRoutingNumber = response.BankAccount?.RoutingNumber  // transmitted
    };
}

public async Task<InvoiceData> ProcessInvoiceAsync(string pdfPath)
{
    var pdfBytes = File.ReadAllBytes(pdfPath);

    // Invoice uploaded to 非常 — banking details included
    var response = await _client.ProcessDocumentAsync(
        fileData: pdfBytes,
        fileName: Path.GetFileName(pdfPath),
        categories: new[] { "invoices" }
    );

    return new InvoiceData
    {
        InvoiceNumber    = response.InvoiceNumber,
        VendorName       = response.Vendor?.Name,
        VendorTaxId      = response.Vendor?.TaxId,       // transmitted
        Total            = response.Total,
        DueDate          = response.DueDate,
        PaymentTerms     = response.PaymentTerms,
        BankAccountNumber = response.BankAccount?.AccountNumber, // transmitted
        BankRoutingNumber = response.BankAccount?.RoutingNumber  // transmitted
    };
}

// 银行对账单处理 — critical sensitivity
public async Task<BankStatementData> ProcessBankStatementAsync(string pdfPath)
{
    var pdfBytes = File.ReadAllBytes(pdfPath);

    // AT THIS POINT: full financial history leaves your infrastructure
    // Account numbers, transaction history, balances — all transmitted
    var response = await _client.ProcessDocumentAsync(
        fileData: pdfBytes,
        categories: new[] { "bank_statements" }
    );

    return new BankStatementData
    {
        AccountNumber  = response.AccountNumber,  // critical — transmitted
        RoutingNumber  = response.RoutingNumber,  // critical — transmitted
        OpeningBalance = response.OpeningBalance,
        ClosingBalance = response.ClosingBalance,
        Transactions   = response.Transactions?.Select(t => new Transaction
        {
            Date        = t.Date,
            Description = t.Description,
            Amount      = t.Amount,
            Balance     = t.RunningBalance
        }).ToList()
    };
}

// 银行对账单处理 — critical sensitivity
public async Task<BankStatementData> ProcessBankStatementAsync(string pdfPath)
{
    var pdfBytes = File.ReadAllBytes(pdfPath);

    // AT THIS POINT: full financial history leaves your infrastructure
    // Account numbers, transaction history, balances — all transmitted
    var response = await _client.ProcessDocumentAsync(
        fileData: pdfBytes,
        categories: new[] { "bank_statements" }
    );

    return new BankStatementData
    {
        AccountNumber  = response.AccountNumber,  // critical — transmitted
        RoutingNumber  = response.RoutingNumber,  // critical — transmitted
        OpeningBalance = response.OpeningBalance,
        ClosingBalance = response.ClosingBalance,
        Transactions   = response.Transactions?.Select(t => new Transaction
        {
            Date        = t.Date,
            Description = t.Description,
            Amount      = t.Amount,
            Balance     = t.RunningBalance
        }).ToList()
    };
}

using IronOcr;
using System.Text.RegularExpressions;

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

public class LocalFinancialDocumentProcessor
{
    private readonly IronTesseract _ocr = new IronTesseract();

    public BankStatementResult ProcessBankStatement(string pdfPath)
    {
        // All processing on your infrastructure
        // 否 network calls — no external access
        using var input = new OcrInput();
        input.LoadPdf(pdfPath);

        var result = _ocr.Read(input);
        var text   = result.Text;

        // Account numbers stay on your server
        return new BankStatementResult
        {
            AccountNumber = ExtractAccountNumber(text),
            Balance       = ExtractBalance(text),
            RawText       = text,
            Confidence    = result.Confidence
        };
    }

    private string ExtractAccountNumber(string text)
    {
        var match = Regex.Match(text,
            @"Account\s*#?\s*:?\s*(\d{4,})",
            RegexOptions.IgnoreCase);
        return match.Success ? match.Groups[1].Value : null;
    }

    private decimal? ExtractBalance(string text)
    {
        var match = Regex.Match(text,
            @"Balance:?\s*\$?([\d,]+\.?\d*)",
            RegexOptions.IgnoreCase);
        if (match.Success && decimal.TryParse(
            match.Groups[1].Value.Replace(",", ""), out var bal))
            return bal;
        return null;
    }
}

using IronOcr;
using System.Text.RegularExpressions;

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

public class LocalFinancialDocumentProcessor
{
    private readonly IronTesseract _ocr = new IronTesseract();

    public BankStatementResult ProcessBankStatement(string pdfPath)
    {
        // All processing on your infrastructure
        // 否 network calls — no external access
        using var input = new OcrInput();
        input.LoadPdf(pdfPath);

        var result = _ocr.Read(input);
        var text   = result.Text;

        // Account numbers stay on your server
        return new BankStatementResult
        {
            AccountNumber = ExtractAccountNumber(text),
            Balance       = ExtractBalance(text),
            RawText       = text,
            Confidence    = result.Confidence
        };
    }

    private string ExtractAccountNumber(string text)
    {
        var match = Regex.Match(text,
            @"Account\s*#?\s*:?\s*(\d{4,})",
            RegexOptions.IgnoreCase);
        return match.Success ? match.Groups[1].Value : null;
    }

    private decimal? ExtractBalance(string text)
    {
        var match = Regex.Match(text,
            @"Balance:?\s*\$?([\d,]+\.?\d*)",
            RegexOptions.IgnoreCase);
        if (match.Success && decimal.TryParse(
            match.Groups[1].Value.Replace(",", ""), out var bal))
            return bal;
        return null;
    }
}

// 非常 error categories reflect cloud dependencies
public async Task<ReceiptData> ProcessWithHandlingAsync(string path)
{
    try
    {
        var bytes    = File.ReadAllBytes(path);
        var response = await _client.ProcessDocumentAsync(bytes);
        return MapToReceiptData(response);
    }
    catch (VeryfiApiException ex) when (ex.StatusCode == 401)
    {
        // Credential failure — check all four credentials
        throw new Exception("Authentication failed. Verify clientId, clientSecret, username, apiKey.", ex);
    }
    catch (VeryfiApiException ex) when (ex.StatusCode == 402)
    {
        // Plan quota exceeded — processing halted until billing resolved
        throw new Exception("Quota exceeded. Check plan limits and billing.", ex);
    }
    catch (VeryfiApiException ex) when (ex.StatusCode == 429)
    {
        // Rate limited — requires exponential backoff implementation
        throw new Exception("Rate limit exceeded. Implement retry with backoff.", ex);
    }
    catch (VeryfiApiException ex) when (ex.StatusCode == 500)
    {
        // 非常 infrastructure failure — your processing is down
        throw new Exception("Veryfi server error. Processing unavailable.", ex);
    }
}

// 非常 error categories reflect cloud dependencies
public async Task<ReceiptData> ProcessWithHandlingAsync(string path)
{
    try
    {
        var bytes    = File.ReadAllBytes(path);
        var response = await _client.ProcessDocumentAsync(bytes);
        return MapToReceiptData(response);
    }
    catch (VeryfiApiException ex) when (ex.StatusCode == 401)
    {
        // Credential failure — check all four credentials
        throw new Exception("Authentication failed. Verify clientId, clientSecret, username, apiKey.", ex);
    }
    catch (VeryfiApiException ex) when (ex.StatusCode == 402)
    {
        // Plan quota exceeded — processing halted until billing resolved
        throw new Exception("Quota exceeded. Check plan limits and billing.", ex);
    }
    catch (VeryfiApiException ex) when (ex.StatusCode == 429)
    {
        // Rate limited — requires exponential backoff implementation
        throw new Exception("Rate limit exceeded. Implement retry with backoff.", ex);
    }
    catch (VeryfiApiException ex) when (ex.StatusCode == 500)
    {
        // 非常 infrastructure failure — your processing is down
        throw new Exception("Veryfi server error. Processing unavailable.", ex);
    }
}

using IronOcr;

var ocr = new IronTesseract();

// Synchronous — result immediately available
// 否 network, no quota, no rate limits
var result = ocr.Read("receipt.jpg");

Console.WriteLine(result.Text);
Console.WriteLine($"Confidence: {result.Confidence}%");

// Word-level positioning for precise field extraction
foreach (var line in result.Lines)
{
    Console.WriteLine($"Y={line.Y}: {line.Text}");
}

using IronOcr;

var ocr = new IronTesseract();

// Synchronous — result immediately available
// 否 network, no quota, no rate limits
var result = ocr.Read("receipt.jpg");

Console.WriteLine(result.Text);
Console.WriteLine($"Confidence: {result.Confidence}%");

// Word-level positioning for precise field extraction
foreach (var line in result.Lines)
{
    Console.WriteLine($"Y={line.Y}: {line.Text}");
}

// Preserve async signature during transition
public async Task<ReceiptResult> ProcessReceiptAsync(string path)
{
    // RunIronOCRon a background thread
    return await Task.Run(() =>
    {
        var result = _ocr.Read(path);
        return new ReceiptResult
        {
            Vendor = result.Lines.FirstOrDefault()?.Text,
            Total  = ExtractTotal(result.Text),
            Date   = ExtractDate(result.Text)
        };
    });
}

// Preserve async signature during transition
public async Task<ReceiptResult> ProcessReceiptAsync(string path)
{
    // RunIronOCRon a background thread
    return await Task.Run(() =>
    {
        var result = _ocr.Read(path);
        return new ReceiptResult
        {
            Vendor = result.Lines.FirstOrDefault()?.Text,
            Total  = ExtractTotal(result.Text),
            Date   = ExtractDate(result.Text)
        };
    });
}