I think there’s nothing built-in, but you could do something like this with System.IO.File.Exists:
public static bool ExistsOnPath(string fileName)
{
return GetFullPath(fileName) != null;
}
public static string GetFullPath(string fileName)
{
if (File.Exists(fileName))
return Path.GetFullPath(fileName);
var values = Environment.GetEnvironmentVariable("PATH");
foreach (var path in values.Split(Path.PathSeparator))
{
var fullPath = Path.Combine(path, fileName);
if (File.Exists(fullPath))
return fullPath;
}
return null;
}