This article describes the way to read or write into the excel workbook(or a file, used interchangeably) pro-grammatically using C#.NET language and ACE Oledb data providers by Microsoft.
This covers the following topics:

• System Requirements
• Development Environment
• Versions of Excel files which can be read or written
• How to build a connection string?
• How to build a command string?
• Possible errors and exceptions

System Requirements
To read/write the excel worksheet using ACE oledb providers, MS office need not to be installed on a machine. An installable package containing ACE oledb providers can be installed from ACE OLEDB Installer Location
Go to this link to install the required version and also check the system requirements.
Note: You can install either 32 bits version or 64 bits version but not both. Also, if you have 64 bits office installed then you can’t install 32 bits ACE oledb and vice versa.
Check the requirements carefully on the page.

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