public void RemoveSignatures(
    Stream inputStream,
    Stream outputStream
)

Public Sub RemoveSignatures(
    inputStream As Stream,
    outputStream As Stream
)

string input_docx = "Template_signed.docx";
string output_docx = "Template_cleared.docx";

//Remove signatures from DOCX document:
using (Stream signedContent = new FileStream(input_docx, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
    using (Stream clearedContent = new FileStream(output_docx, FileMode.Create, FileAccess.Write, FileShare.Read))
    {
        DocumentSigner remover = new DocumentSigner();
        remover.RemoveSignatures(signedContent, clearedContent);
    }
}

string input_workbook = "Template_signed.xlsx";
string output_workbook = "Template_cleared.xlsx";

//Remove signatures form XLSX document:
using (Stream signedContent = new FileStream(input_workbook, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
    using (Stream clearedContent = new FileStream(output_workbook, FileMode.Create, FileAccess.Write, FileShare.Read))
    {
        DocumentSigner remover = new DocumentSigner();
        remover.RemoveSignatures(signedContent, clearedContent);
    }
}

Dim input_docx As String = "Template_signed.docx"
Dim output_docx As String = "Template_cleared.docx"

'Remove signatures from DOCX document:
Using signedContent As Stream = New FileStream(input_docx, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)
  Using clearedContent As Stream = New FileStream(output_docx, FileMode.Create, FileAccess.Write, FileShare.Read)
    Dim remover As New DocumentSigner()
    remover.RemoveSignatures(signedContent, clearedContent)
  End Using
End Using

Dim input_workbook As String = "Template_signed.xlsx"
Dim output_workbook As String = "Template_cleared.xlsx"

'Remove signatures form XLSX document:
Using signedContent As Stream = New FileStream(input_workbook, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)
  Using clearedContent As Stream = New FileStream(output_workbook, FileMode.Create, FileAccess.Write, FileShare.Read)
    Dim remover As New DocumentSigner()
    remover.RemoveSignatures(signedContent, clearedContent)
  End Using
End Using