C# Application is written with .Net Framework 4.0 But It Requires .Net Framework 4.6.2

Question

I have a 2 WPF application uses .Net Framework 4.0 and suddlenly one of them started to require .Net Frameowork 4.6.2 in my clients Windows 7 computers. In properties Target Framework is still 4.0.

I checked my commits, a while ago I changed 2 things in AssemblyInfo.cs.

1. [assembly: ComVisible(false)] to [assembly: ComVisible(true)]

2. [assembly: AssemblyVersion("1.0.0.0")] to [assembly: AssemblyVersion("1.0.*")]

Answer 1

Found the solution, it works when users remove .exe.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <startup> 
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2"/>
  </startup>
</configuration>

but still I don't understand why VS creates this file.