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.NET Programming: A Practical Guide Using C# by Pradeep Tapadiya

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Introduction

Windows is a secure OS. The security offered by the OS protects the local machine from any unauthorized user operation. Each secured resource under the OS, such as the Windows registry or an NTFS file, can be configured to allow access to some users, while denying access to others. This approach, however, fails to address an important security issue: users acquiring and running third-party applications that potentially could be malicious. Today, users obtain the applications from many sources. They have no idea what the application code does internally. The code may delete some important files on the local disk. Worst yet, the code may leak your private data. The quality of the code may be poor; it might contain bugs or vulnerabilities ...

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