When installing the Web Application Developer Framework features of ArcGIS Server for the Microsoft .NET Framework 9.3 on an unsupported version of Visual Studio, the installer should display a more
descriptive error than the following: "An unhandled exception ('System.IO.IOException') occurred in CodeConverterUtil.exe [3656]".
A duplicate issue exists in the IDE integration area already
解决办法
Perform a Custom Installation of ArcGIS Server .NET 9.3, excluding the"Visual Studio Integration" component(s) of the Web ApplicationDeveloper Framework.