Calling dll from c# code using powershell script not working

I am using System.Management.Automation.dll to execute powershell script from c# code.

Following is my c# code

public void Execute()
        {
            using (var runspace = RunspaceFactory.CreateRunspace())
            {
                try
                {
                    var script = File.ReadAllText("script.ps1");
                    runspace.Open();
                    var ps = PowerShell.Create();
                    ps.Runspace = runspace;
                    ps.Commands.AddScript(script);
                    //ps.Ad
                    ps.Invoke();

                    foreach (var result in ps.Invoke())
                    {
                        Console.WriteLine(result);
                    }
                }
                catch (Exception ex)
                {
                    Debug.WriteLine(ex.Message);
                }
            }
        }

powershell script is

logparser "SELECT top 1 *,null INTO iisLogs FROM 'D:\u_ex200621\*.log' where date >= '2020-01-01' " -i:iisw3c -o:SQL -server:172.29.182.160 -database:DBA_Work -username:azuredev -password:cybage@123 -transactionRowCount:10000 -createTable: OFF

I have added logparser.dll path to Environment Variable so I can execute it from anywhere on machine.

But I tried to execute above code it did not execute anything.Same script I tried using Power shell then it works perfectly.

Please let me know correct way to execute powershell script using C# code.I tried multiple solutions on stackoverflow but no luck.