C#

var shell = PowerShell.Create();
string filePath = Server.MapPath("PowerShell/GetInfo.ps1");
StreamReader reader = File.OpenText(filePath);
string powerShellCode = reader.ReadToEnd();
reader.Close();
shell.Commands.AddScript(powerShellCode); // tells powershell what to run
var results = shell.Invoke(); // runs the script

// Note : use |out-string for console-like output
if (results.Count > 0)
{
    // We use a string builder ton create our result text
    var builder = new StringBuilder();
    foreach (var psObject in results)
    {
        // Convert the Base Object to a string and append it to the string builder.
        // Add \r\n for line breaks
        builder.Append(psObject.BaseObject.ToString() + "\r\n");
    }
    // Encode the string in HTML (prevent security issue with 'dangerous' caracters like < >
    detailsLabel.Text = Server.HtmlEncode(builder.ToString());
    powerShellCode = String.Empty;
    //psobject = String.Empty;
}