Sorted:

ASPxFileManager is not working. Script errors occur-Collection of common programming errors

How to get selected value from DevExpress comboBox-Collection of common programming errors

“Directory is not empty” error when trying to programmatically delete a folder-Collection of common programming errors

DevExpress Menu linked to a siteMap-Collection of common programming errors

Getting an error after sending a request to web server-Collection of common programming errors

ReadAsMultipartAsync Throws System.ArgumentException-Collection of common programming errors

Mysql Connector always get Object reference not set to an instance of an object-Collection of common programming errors

User controls Stopped working after Migration from 3.7 to 5.2-Collection of common programming errors

NPOI dll (third party excel writer dll)…System.Security.SecurityException: That assembly does not allow partially trusted callers-Collection of common programming errors

ASPxGridView page works for some users, not for others. WebForm model using C#, ASP, SQL Express-Collection of common programming errors