TimeoutMs 提供一个可选的毫秒级超时，超过此时间将取消 OCR 读取操作。
与 AbortToken 类似，TimeoutMs 也帮助读取大型输入文件，以防程序或应用卡住。
请注意，.NET Framework 4.xx 不支持此功能。
探索使用 IronOCR 在 C# 中进行异步 OCR 处理using IronOcr;
int cancel_time = 1000;
// Opens a Large PDF which may need to be cancelled early
IronTesseract ocrTesseract = new IronTesseract() { Language = OcrLanguage.English };
var ocrInput = new OcrInput();
ocrInput.LoadPdf("large-report.pdf");
// Starts a read on the PDF using IronOCR with specified cancel time
OcrReadTask ocrRead = ocrTesseract.ReadAsync(ocrInput, cancel_time);
ocrRead.Wait();
Imports IronOcr
Dim cancel_time As Integer = 1000
' Opens a Large PDF which may need to be cancelled early
Dim ocrTesseract As New IronTesseract() With {.Language = OcrLanguage.English}
Dim ocrInput = New OcrInput()
ocrInput.LoadPdf("large-report.pdf")
' Starts a read on the PDF using IronOCR with specified cancel time
Dim ocrRead As OcrReadTask = ocrTesseract.ReadAsync(ocrInput, cancel_time)
ocrRead.Wait()
