Provides a set of methods and properties that help debug your code with the specified writer, request, category and exception.
Namespace:  System.Web.Http.Tracing
Assembly:  System.Web.Http (in System.Web.Http.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Sub Debug ( _
    traceWriter As ITraceWriter, _
    request As HttpRequestMessage, _
    category As String, _
    exception As Exception _
)
'Usage
Dim traceWriter As ITraceWriter 
Dim request As HttpRequestMessage 
Dim category As String 
Dim exception As Exception 
traceWriter.Debug(request, category, _
    exception)
public static void Debug(
    this ITraceWriter traceWriter,
    HttpRequestMessage request,
    string category,
    Exception exception
)
[ExtensionAttribute]
public:
static void Debug(
    ITraceWriter^ traceWriter, 
    HttpRequestMessage^ request, 
    String^ category, 
    Exception^ exception
)
static member Debug : 
        traceWriter:ITraceWriter * 
        request:HttpRequestMessage * 
        category:string * 
        exception:Exception -> unit
public static function Debug(
    traceWriter : ITraceWriter, 
    request : HttpRequestMessage, 
    category : String, 
    exception : Exception
)
Parameters
- traceWriter 
 Type: System.Web.Http.Tracing.ITraceWriter- The ITraceWriter. 
- request 
 Type: HttpRequestMessage- The HttpRequestMessage with which to associate the trace. It may be null. 
- category 
 Type: System.String- The logical category of the trace. 
- exception 
 Type: System.Exception- The error occurred during execution. 
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type ITraceWriter. When you use instance method syntax to call this method, omit the first parameter. For more information, see https://msdn.microsoft.com/en-us/library/bb384936(v=vs.108) or https://msdn.microsoft.com/en-us/library/bb383977(v=vs.108).