Execute Powershell Cmdlet in C#

ExecutePowershellCmdlet.cs

using System.Management.Automation;

namespace ExecutePowershellCmdlet {

  class Program {
  
    using (PowerShell pshell = PowerShell.Create()) {
    
      DateTime yesterday = DateTime.Today.AddDays(-1);
      string date_string = "\"" + yesterday.ToString("MM"_ + "/" + yesterday.ToString("dd") + "/" + yesterday.ToString("yyyy") + "\""; // "MM/dd/yyyy"
      string name_regex = "'^[0-9]{4,4}\\.dw*$'";
      pshell.AddScript("dir \"k:\\jobs\\\" -Directory | Where-Object { $_.LastWriteTime -ge " + date_string + " -and $_.Name -match " + name_reges + " } | Copy-Item -Destination c:\\copy_to -recurse");
      pshell.Invoke();
    }
    
  }
  
}