c# - Rewriting method declaration -

i'm iterating on methods in type , have rewrite aren't static. i'd have insert parameter either first or last parameter can't figure out how create parametersyntax object

this have far

var methods = m in r.members.oftype<methoddeclarationsyntax>()               !m.modifiers.contains(syntax.token(syntaxkind.statickeyword))               select new {                    orgmethoddecl = m,                     rewrittendecl = rewritemethoddeclaration(m,name)};                     var rewrittentype = r;                    foreach(var m in methods){                         rewrittentype = rewrittentype.replacenode(m.orgmethoddecl, m.rewrittendecl);                    } 

and rewritemethoddeclaration have issue

    methoddeclarationsyntax rewritemethoddeclaration(methoddeclarationsyntax method, string name)     {         var p = syntax.parameter(); //type dynamic, name: name         var parameters = method.parameterlist.addparameters(p);         return method.withparameterlist(parameters);     } 

try this:

static methoddeclarationsyntax      rewritemethoddeclaration(methoddeclarationsyntax method, string name) {     var type = syntax.parsetypename("dynamic");     var identifier = syntax.identifier(string.format(" {0}", name));     var p = syntax.parameter(         new syntaxlist<attributelistsyntax>(),         new syntaxtokenlist(),         type,         identifier,         null);     var parameters = method.parameterlist.addparameters(p);     return method.withparameterlist(parameters); }