Escape ampersand while executing the script

Question

I am trying to execute the PowerShell from WPF by pointing to the powershell.exe path. I have the following code

The error I am getting is The ampersand (&) character is not allowed. The & operator is reserved for future use; wrap an ampersand in double quotation marks ("&") to pass it as part of a string.

 

http://blog.heshamamin.com/2009/04/calling-powershell-script-in-path-with.html

 

string PSPath = string.Concat(Environment.SystemDirectory, "\\WindowsPowerShell\\v1.0\\powershell.exe");
string ScriptPath = string.Concat(PSPath, " -ExecutionPolicy Unrestricted -Command ");
string CommandPath = string.Concat("\"& {&'", regex[0].ToString(), "'", regex[1].ToString(), "}\"");
ScriptPath = string.Concat(ScriptPath, CommandPath);
using (Process p = new Process())
{
    p.StartInfo.UseShellExecute = false;
    p.StartInfo.RedirectStandardOutput = true;
    p.StartInfo.FileName = PSPath;
    p.StartInfo.Arguments = ScriptPath;
    p.Start();
    string error = p.StandardOutput.ReadToEnd();
}

My script looks as follows:

 

C:\WINDOWS\system32\WindowsPowerShell\v1.0\powershell.exe -ExecutionPolicy Unrestricted -Command "& {&'C:\TestPS\Testps1' -Arg1 -Arg2}"

 which is executing fine when I directly copy paste into PowerShell, but not from the Win froms application.