What is auto-start feature in asp.net 4.0?

It is an feature which can be automatically started by using the configuration in the applicationHost.config file.

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Explain Windows HTTP Services Certificate Configuration Tool (WinHttpCertCfg.exe)?

The Microsoft Windows HTTP Services (WinHTTP) Certificate Configuration Tool, WinHttpCertCfg.exe, enables administrators to install and configure client certificates in any
certificate store that can be accessed by the Internet Server Web Application Manager (IWAM) account.

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What is the tool which is used to configure Windows HTTP Services Certificate ?

WinHttpCertCfg.exe

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