Only include Errors in exception message.

Author: William D Cossey

RazorEngineCore/RazorEngine.cs

@@ -108,11 +108,9 @@ private MemoryStream CreateAndCompileToStream(string templateSource, RazorEngine
 
             if (!emitResult.Success)
             {
-                List<Diagnostic> errors = emitResult.Diagnostics.ToList();
-
-                RazorEngineCompilationException exception = new RazorEngineCompilationException($"Unable to compile template: \n{string.Join("\n", errors)}")
+                RazorEngineCompilationException exception = new RazorEngineCompilationException()
                 {
-                    Errors = errors,
+                    Errors = emitResult.Diagnostics.ToList(),
                     GeneratedCode = razorCSharpDocument.GeneratedCode
                 };
 

RazorEngineCore/RazorEngineCompilationException.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Runtime.Serialization;
 using Microsoft.CodeAnalysis;
 
@@ -15,15 +16,14 @@ protected RazorEngineCompilationException(SerializationInfo info, StreamingConte
         {
         }
 
-        public RazorEngineCompilationException(string message) : base(message)
-        {
-        }
-
-        public RazorEngineCompilationException(string message, Exception innerException) : base(message, innerException)
+        public RazorEngineCompilationException(Exception innerException) : base(null, innerException)
         {
         }
 
         public List<Diagnostic> Errors { get; set; }
+        
         public string GeneratedCode { get; set; }
+
+        public override string Message => $"Unable to compile template: {string.Join("\n", Errors.Where(w => w.IsWarningAsError || w.Severity == DiagnosticSeverity.Error))}";
     }
 }