public static IClrRuntimeInfo GetRuntime(IEnumUnknown runtimes, String version)
{
Object[] temparr = new Object[3];
UInt32 fetchedNum;
do
{
runtimes.Next(Convert.ToUInt32(temparr.Length), temparr, out fetchedNum);
for (Int32 i = 0; i < fetchedNum; i++)
{
IClrRuntimeInfo t = (IClrRuntimeInfo)temparr[i];
// version not specified we return the first one
if (String.IsNullOrEmpty(version))
{
return(t);
}
// initialize buffer for the runtime version string
StringBuilder sb = new StringBuilder(16);
UInt32 len = Convert.ToUInt32(sb.Capacity);
t.GetVersionString(sb, ref len);
"version: {0}".info(sb.str());
if (sb.ToString().StartsWith(version, StringComparison.Ordinal))
{
return(t);
}
}
} while (fetchedNum == temparr.Length);
return(null);
}
bool IsCLRVersionInstalled(Version clrVersion)
{
object pCLRMetaHost;
bool isRuntimeVersionDetermined = false;
if (SafeNativeMethods.ERROR_SUCCESS == SafeNativeMethods.CLRCreateInstance(CLSID_CLRMetaHost, typeof(IClrMetaHost).GUID, out pCLRMetaHost))
{
IClrMetaHost metaHost = (IClrMetaHost)pCLRMetaHost;
IEnumUnknown enumUnknownPtr;
enumUnknownPtr = metaHost.EnumerateInstalledRuntimes();
object[] pUnk = new object[1];
int pceltFetched;
while (SafeNativeMethods.ERROR_SUCCESS == enumUnknownPtr.Next(1, pUnk, out pceltFetched) && !isRuntimeVersionDetermined)
{
int bufferSize = 256;
StringBuilder builder = new StringBuilder(256);
IClrRuntimeInfo runtimeInfo = (IClrRuntimeInfo)pUnk[0];
runtimeInfo.GetVersionString(builder, ref bufferSize);
Version installedClrVersion;
if (TryGetVersionFromString(builder, out installedClrVersion))
{
if (clrVersion.Major == installedClrVersion.Major && clrVersion.Minor == installedClrVersion.Minor)
{
isRuntimeVersionDetermined = true;
}
}
}
}
return(isRuntimeVersionDetermined);
}