c# - ASP.NET Web API 2 operation DELETE with guid -

i have simple method:

    public async task<string> delete(guid id)     {         var success = await productfacade.deleteproductasync(id);         if (!success)         {             throw new httpresponseexception(httpstatuscode.notfound);         }         return $"deleted product id: {id}";     } 

but when try make delete request fiddler, says:

{"message":"the request invalid.","messagedetail":"the parameters dictionary contains null entry parameter 'id' of non-nullable type 'system.guid' method 'system.threading.tasks.task`1[system.string] delete(system.guid)' in 'demoeshop.webapi.controllers.productscontroller'. optional parameter must reference type, nullable type, or declared optional parameter."}

delete request is: http://localhost:56118/api/products/aa16dc64-5c07-40fe-a916-175165b9b90

really interesting put method uses guid parameter works. here is:

    public async task<string> put(guid id, [frombody]productdto product)     {         if (!modelstate.isvalid)         {             throw new httpresponseexception(httpstatuscode.badrequest);         }         var success = await productfacade.editproductasync(product);         if (!success)         {             throw new httpresponseexception(httpstatuscode.notfound);         }         return $"updated product id: {id}";     } 

do have idea why delete not work?

your guid sending via fiddler contains 31 hex digit instead of 32.

http://localhost:56118/api/products/aa16dc64-5c07-40fe-a916-175165b9b90

the last fifth segment should have 12 hex digits, have 11. cause guid.parse() fail.