How to pass variables to a class in c# -

i've simple code:

class resourceinterceptor: iresourceinterceptor         {              public bool onfilternavigation(navigationrequest request)             {                 return false;             }              resourceresponse iresourceinterceptor.onrequest(resourcerequest request)             {                 request.referrer = "http://www.google.com";                 return null;             }         } 

i need pass variable class (just read it, not edit), if insert variable not declared within class gives me error:

cannot access non-static member of outer type 'windowsformsapplication1.form1' via nested type 'windowsformsapplication1.form1.resourceinterceptor'

for example need somethin (obviously doesn't works!)

public string referrer = "www.google.com"; class resourceinterceptor: iresourceinterceptor         {              public bool onfilternavigation(navigationrequest request)             {                 return false;             }              resourceresponse iresourceinterceptor.onrequest(resourcerequest request)             {                 request.referrer = referrer;                 return null;             }         } 

you can use initializing constructor. example:

class resourceinterceptor: iresourceinterceptor {     public resourceinterceptor(string referer)     {         m_referer = referer;     }      public bool onfilternavigation(navigationrequest request)     {         return false;     }      resourceresponse iresourceinterceptor.onrequest(resourcerequest request)     {         request.referrer = m_referrer;         return null;     }      private string m_referer; } 

and pass referer constructor when create instance of class:

resourceinterceptor interceptor = new resourceinterceptor("www.google.com");