actually, one just need an initialisation method for templates

Yavsc.Abstract/Templates/Template.cs

@@ -10,8 +10,7 @@ namespace Yavsc.Abstract.Templates
   public abstract class Template
   {
 
-    StringBuilder _buffer = new StringBuilder();
-
+    StringBuilder _buffer ;
 
     public virtual void Write(object value)
     { WriteLiteral(value); }
@@ -25,7 +24,9 @@ namespace Yavsc.Abstract.Templates
       }
     }
 
-    public abstract Task ExecuteAsync();
+    public virtual void Init() {
+       _buffer = new StringBuilder();
+    }
 
   }
 }

Yavsc/Templates/UserOrientedTemplate.cs

@@ -7,12 +7,5 @@ namespace Yavsc.Templates
     public class UserOrientedTemplate: Template
     {
         public ApplicationUser User { get; set; }
-        
-            
-        public override async Task ExecuteAsync ()
-        {
-          throw new System.NotImplementedException();
-        }
-
     }
 }

cli/Services/EMailer.cs

@@ -122,17 +122,21 @@ namespace cli.Services
             using (var ms = new MemoryStream())
             {
                 EmitResult result = compilation.Emit(ms);
-
+                foreach (Diagnostic diagnostic in result.Diagnostics.Where(diagnostic => 
+                        diagnostic.Severity < DiagnosticSeverity.Error && !diagnostic.IsWarningAsError))
+                    {
+                        logger.LogWarning("{0}: {1}", diagnostic.Id, diagnostic.GetMessage());
+                        logger.LogWarning("{0}: {1}", diagnostic.Id, diagnostic.Location.GetLineSpan());
+                    }
                 if (!result.Success)
                 {
                     IEnumerable<Diagnostic> failures = result.Diagnostics.Where(diagnostic => 
                         diagnostic.IsWarningAsError || 
                         diagnostic.Severity == DiagnosticSeverity.Error);
-
                     foreach (Diagnostic diagnostic in failures)
                     {
                         logger.LogCritical("{0}: {1}", diagnostic.Id, diagnostic.GetMessage());
-                        logger.LogDebug("{0}: {1}", diagnostic.Id, diagnostic.Location.GetLineSpan());
+                        logger.LogCritical("{0}: {1}", diagnostic.Id, diagnostic.Location.GetLineSpan());
                     }
                 }
                 else
@@ -142,12 +146,10 @@ namespace cli.Services
 
                     Type type = assembly.GetType(DefaultNamespace+"."+className);
                     var generatedtemplate = (UserOrientedTemplate) Activator.CreateInstance(type);
-                    logger.LogInformation(generatedtemplate.ToString());     
                     foreach (var user in dbContext.ApplicationUser) {
-                      logger.LogInformation(user.ToString()); 
-
+                      logger.LogInformation ("Generation for "+user.UserName);
+                      generatedtemplate.Init();  
                       generatedtemplate.User = user;
-                      generatedtemplate.ExecuteAsync().Wait();
                       
                       logger.LogInformation (generatedtemplate.GeneratedText);
                     } 

cli/project.json

@@ -38,7 +38,7 @@
         "Microsoft.Extensions.Logging.Console": "1.0.0-rc1-final",
         "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-rc1-*",
         "Microsoft.AspNet.Identity": "3.0.0-rc1-*",
-        "Yavsc": "1.0.5-rc12",
+        "Yavsc": "1.0.5-rc13",
         "Microsoft.Extensions.DependencyInjection.Abstractions": "1.0.0-rc1-final",
         "Microsoft.Extensions.Logging.Debug": "1.0.0-rc1-final",
         "Microsoft.CodeAnalysis": "1.0.0-rc1"
@@ -46,4 +46,4 @@
     "frameworks": {
         "dnx451": {}
     }
-}
+}

cli/project.lock.json

@@ -12024,7 +12024,7 @@
       "Microsoft.Extensions.Logging.Console >= 1.0.0-rc1-final",
       "Microsoft.AspNet.Identity.EntityFramework >= 3.0.0-rc1-*",
       "Microsoft.AspNet.Identity >= 3.0.0-rc1-*",
-      "Yavsc >= 1.0.5-rc12",
+      "Yavsc >= 1.0.5-rc13",
       "Microsoft.Extensions.DependencyInjection.Abstractions >= 1.0.0-rc1-final",
       "Microsoft.Extensions.Logging.Debug >= 1.0.0-rc1-final",
       "Microsoft.CodeAnalysis >= 1.0.0-rc1"