private static bool VerifyDevDiv(VcRedistInfo info, RegistryView bit)
{
var regVersion = $"{(int) info.Version}.0";
using (var reg = OpenRegistry(bit)
.OpenSubKey($@"SOFTWARE\Microsoft\DevDiv\vc\Servicing\{regVersion}\RuntimeMinimum"))
{
if (reg != null && TryConfirm(reg, "Install"))
{
return(true);
}
}
return(false);
}
private static bool VerifyVS(VcRedistInfo info, RegistryView bit)
{
var regVersion = $"{(int)info.Version}.0";
using (var reg = OpenRegistry(RegistryView.Registry32) // must look up in 32-bit registry
.OpenSubKey($@"SOFTWARE\Microsoft\VisualStudio\{regVersion}\VC\Runtimes\" +
(bit == RegistryView.Registry32 ? "x86" : "x64")))
{
if (reg != null && TryConfirm(reg, "Installed"))
{
return(true);
}
}
return(false);
}
private static bool VerifySystemFile(VcRedistInfo info, RegistryView bit)
{
switch (bit)
{
case RegistryView.Registry32:
{
var folder = Environment.GetFolderPath(Environment.SpecialFolder.SystemX86);
return(File.Exists(Path.Combine(folder, info.SystemFile)));
}
case RegistryView.Registry64:
{
var folder = Environment.GetFolderPath(Environment.SpecialFolder.System);
return(File.Exists(Path.Combine(folder, info.SystemFile)));
}
// TODO: This would be 64-bit on 64-bit runtime, and 32-bit on 32-bit runtime :S
case RegistryView.Default:
throw new NotSupportedException(bit + " is not supported");
default:
throw new NotSupportedException(bit + " is not supported");
}
}
private static bool CheckVcRedistInstalled(VcRedistInfo info, RegistryView bit = RegistryView.Registry32) => VerifyRegistry(info, bit) && VerifySystemFile(info, bit);
private static bool VerifyRegistry(VcRedistInfo info, RegistryView bit) => VerifyDevDiv(info, bit) && VerifyVS(info, bit);