Added documentation for issue severity.

ICSharpCode.NRefactory.CSharp/Refactoring/Severity.cs

@@ -27,16 +27,35 @@ using System;
 
 namespace ICSharpCode.NRefactory.CSharp
 {
+	/// <summary>
+	/// The severity influences how the task bar reacts on found issues.
+	/// </summary>
 	public enum Severity
 	{
+		/// <summary>
+		/// None means that the task bar doesn't show the issue.
+		/// </summary>
 		None,
 
+		/// <summary>
+		/// Errors are shown in red and that the task bar is in error state if 1 error is found.
+		/// </summary>
 		Error,
+
+		/// <summary>
+		/// Warnings are shown in yellow and set the task bar to warning state (if no error is found).
+		/// </summary>
 		Warning,
-		Hint,
+
+		/// <summary>
+		/// Suggestions are shown in green and doesn't influence the task bar state
+		/// </summary>
 		Suggestion,
 
-		Usage
+		/// <summary>
+		/// Hints are shown in blue and doesn't influence the task bar state
+		/// </summary>
+		Hint
 	}
 }