--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Demo/WebServices/Client/WebClient/WebOperationCancelledEventArgs.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,92 @@
+using System;
+using System.Text;
+using System.Collections;
+
+namespace Demo.WebServices.Client.WebClient
+{
+	public class WebOperationCancelledEventArgs : EventArgs
+	{
+		private readonly string _url;
+		public           string  Url
+		{
+			get { return _url; }
+		}
+
+		private readonly string _methodName;
+		public           string  MethodName
+		{
+			get { return _methodName; }
+		}
+
+		private readonly object[] _parameters;
+		public           object[]  Parameters
+		{
+			get { return _parameters; }
+		}
+
+		public WebOperationCancelledEventArgs(string url, string methodName, object[] parameters)
+		{
+			_url        = url;
+			_methodName = methodName;
+			_parameters = parameters;
+		}
+
+		public string Format()
+		{
+			StringBuilder sb = new StringBuilder();
+			sb
+				.Append(Url)
+				.Append('/')
+				.Append(MethodName)
+				.Append('(')
+				;
+
+			if (Parameters != null)
+			{
+				bool first = true;
+
+				foreach (object parameter in Parameters)
+				{
+					if (first)
+						first = false;
+					else
+						sb.Append(", ");
+
+					try
+					{
+						FormatParameter(parameter, sb);
+					}
+					catch (Exception ex)
+					{
+						sb.Append(ex.ToString());
+					}
+				}
+			}
+
+			return sb.Append(')').ToString();
+		}
+
+		private static void FormatParameter(object parameter, StringBuilder sb)
+		{
+			if (parameter == null)
+				sb.Append("null");
+			else if (parameter is string)
+				sb.Append('"').Append((string)parameter).Append('"');
+			else if (parameter is char)
+				sb.Append('\'').Append((char)parameter).Append('\'');
+			else if (parameter is IEnumerable)
+			{
+				sb.Append('[');
+				bool first = true;
+				foreach (object item in (IEnumerable)parameter)
+				{
+					FormatParameter(item, first? sb: sb.Append(','));
+					first = false;
+				}
+				sb.Append(']');
+			}
+			else
+				sb.Append(parameter.ToString());
+		}
+	}
+}
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