1. Error: Operation is not valid due to the current state of the object' error during postback
Solution:
<appSettings>
<add key="aspnet:MaxHttpCollectionKeys" value="2001" />
</appSettings> "
2. Error: Breaking parent web.config dependencies in sub applications
Solution:
<location path="." inheritInChildApplications="false">
<connectionStrings>
</connectionStrings>
</location>
3. Error: Not allowing to upload file with more size (in MB)
Solution:
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength=”2147483648″/>
</requestFiltering>
</security>
</system.webServer>
4. Error: UnobtrusiveValidationMode requires a ScriptResourceMapping for jQuery
Solution:
In appsettings, add below key-value
<add key="ValidationSettings:UnobtrusiveValidationMode" value="WebForms" />
I will be adding the troubleshooting snippets where ever I have faced and resolved issues related to configuration files.
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