internal static string GetRuntimeVersion(string path)
{
#if FEATURE_MSCOREE
if (NativeMethodsShared.IsWindows)
{
#if DEBUG
// Just to make sure and exercise the code that uses dwLength to allocate the buffer
// when GetRequestedRuntimeInfo fails due to insufficient buffer size.
int bufferLength = 1;
#else
int bufferLength = 11; // 11 is the length of a runtime version and null terminator v2.0.50727/0
#endif
unsafe
{
// Allocate an initial buffer
char *runtimeVersion = stackalloc char[bufferLength];
// Run GetFileVersion, this should succeed using the initial buffer.
// It also returns the dwLength which is used if there is insufficient buffer.
uint hresult = NativeMethods.GetFileVersion(path, runtimeVersion, bufferLength, out int dwLength);
if (hresult == NativeMethodsShared.ERROR_INSUFFICIENT_BUFFER)
{
// Allocate new buffer based on the returned length.
char *runtimeVersion2 = stackalloc char[dwLength];
runtimeVersion = runtimeVersion2;
// Get the RuntimeVersion in this second call.
bufferLength = dwLength;
hresult = NativeMethods.GetFileVersion(path, runtimeVersion, bufferLength, out dwLength);
}
return(hresult == NativeMethodsShared.S_OK ? new string(runtimeVersion, 0, dwLength - 1) : string.Empty);
}
}
else
{
return(ManagedRuntimeVersionReader.GetRuntimeVersion(path));
}
#else
return(ManagedRuntimeVersionReader.GetRuntimeVersion(path));
#endif
}
/// <summary>
/// Given a path get the CLR runtime version of the file
/// </summary>
/// <param name="path">path to the file</param>
/// <returns>The CLR runtime version or empty if the path does not exist.</returns>
internal static string GetRuntimeVersion(string path)
{
#if FEATURE_MSCOREE
if (NativeMethodsShared.IsWindows)
{
StringBuilder runtimeVersion = null;
uint hresult = 0;
uint actualBufferSize = 0;
#if _DEBUG
// Just to make sure and exercise the code that doubles the size
// every time GetRequestedRuntimeInfo fails due to insufficient buffer size.
int bufferLength = 1;
#else
int bufferLength = 11; // 11 is the length of a runtime version and null terminator v2.0.50727/0
#endif
do
{
runtimeVersion = new StringBuilder(bufferLength);
hresult = NativeMethods.GetFileVersion(path, runtimeVersion, bufferLength, out actualBufferSize);
bufferLength = bufferLength * 2;
} while (hresult == NativeMethodsShared.ERROR_INSUFFICIENT_BUFFER);
if (hresult == NativeMethodsShared.S_OK && runtimeVersion != null)
{
return(runtimeVersion.ToString());
}
else
{
return(String.Empty);
}
}
else
{
return(ManagedRuntimeVersionReader.GetRuntimeVersion(path));
}
#else
return(ManagedRuntimeVersionReader.GetRuntimeVersion(path));
#endif
}