OfficeToPDF is a command line utility that converts Microsoft Office 2007 and 2010 documents from their native format into PDF using Office’s in-built PDF export features.

OfficeToPDF is useful (and unique) if you want to automatically create PDF files on a server-wide basis and free individual users from an extra step of using the “Save as…” command on their Office files.

software needs to be installed on Server:
.NET Framework 4
Office 2010 or Office 2007

If you are using Office 2007, you will also need:
Visual Studio 2010 Tools for Office Runtime [Download]
2007 Microsoft Office Add-in: Microsoft Save as PDF or XPS [Download]

Supported File Types:
Word (.doc, .dot, .docx, .dotx, .docm, .dotm)
Excel (.xls, .xlsx, .xlsm)
Powerpoint (.ppt, .pptx, .pptm)
Visio (.vsd)
Publisher (.pub)

Download Office 2 PDF
How to execute on command line?

C:\prakash>officetopdf.exe test.docx test.pdf

First of all you have download “GhostScript” from Here Installed it.

C#.net Code as below

1) Create a new console application in Visual Studio 2010.

2) Copy the below code into your application

public static void PdfToJpg(string ghostScriptPath,string input, string output)
{
//String ars = "-dNOPAUSE -sDEVICE=jpeg -r300 -o" + output + "-%d.jpg " + input;
 String ars = "-dNOPAUSE -sDEVICE=png16m -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r150*150 -o" + output + "-%d.png " + input; //all image generate with full clarity and same pixel size (1275*1650)
Process proc = new Process();
proc.StartInfo.FileName = ghostScriptPath;
proc.StartInfo.Arguments = ars;
proc.StartInfo.CreateNoWindow = true;
       proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
proc.Start();
       proc.WaitForExit()
}
 
Where,
ghostScriptPath: Refers to the full path of the exe file
input: Refers to the full path of the pdf file to covert.
Output: Refers to the full path of the image file name.
For eg.,
static void Main(string[] args)
{
string ghostScriptPath = @"D:\Program Files\gs\gs9.01\bin\gswin32.exe";
string inputFileName = @"C:\test.pdf";
string outputFileName = @"E:\New\test";
PdfToJpg(ghostScriptPath, inputFileName, outputFileName);
}
·       3)  Set the output type of your console application to “Windows Application”.
That’s it.