in ILRepack/PlatformFixer.cs [216:228]
private void FixPlatformVersion(CustomAttribute ca)
{
FixPlatformVersion(ca.Constructor);
if (ca.HasConstructorArguments)
foreach (CustomAttributeArgument caa in ca.ConstructorArguments)
FixPlatformVersion(caa);
if (ca.HasFields)
foreach (CustomAttributeNamedArgument cana in ca.Fields)
FixPlatformVersion(cana);
if (ca.HasProperties)
foreach (CustomAttributeNamedArgument cana in ca.Properties)
FixPlatformVersion(cana);
}