How convert a string? Encode ExtraParam Backslash " \"

[huchaonian]

<ExtraParams >
    <ext:Parameter Name="checks" Value ="#{gnmk}.getChecked('id')" Mode ="Raw"  Encode ="true"    >
    </ext:Parameter>
</ExtraParams>

in the c# codebehind

string jsqx = e.ExtraParams["checks"].ToString ();

        jsqx = jsqx.Replace("[","").Replace("]","");

string[] jsqxarr = jsqx.Split(',');

but the jsqx string contain Backslash " \",jsqxarr[0] contain Backslash " \" , How can I convert a string it?