Changed RazorEngineCompilationOptions.ReferencedAssemblies/DefaultUsings to HashSet<>

Author: William David Cossey

RazorEngineCore/RazorEngine.cs

@@ -109,11 +109,11 @@ private MemoryStream CreateAndCompileToStream(string templateSource, RazorEngine
         private string WriteDirectives(string content, RazorEngineCompilationOptions options)
         {
             StringBuilder stringBuilder = new StringBuilder();
-            stringBuilder.AppendLine("@inherits " + options.Inherits);
+            stringBuilder.AppendLine($"@inherits {options.Inherits}");
 
             foreach (string entry in options.DefaultUsings)
             {
-                stringBuilder.AppendLine("@using " + entry);
+                stringBuilder.AppendLine($"@using {entry}");
             }
 
             stringBuilder.Append(content);

RazorEngineCore/RazorEngineCompilationOptions.cs

@@ -5,7 +5,7 @@ namespace RazorEngineCore
 {
     public class RazorEngineCompilationOptions
     {
-        public IList<Assembly> ReferencedAssemblies { get; set; } = new List<Assembly>()
+        public HashSet<Assembly> ReferencedAssemblies { get; set; } = new HashSet<Assembly>()
         {
             typeof(object).Assembly,
             Assembly.Load(new AssemblyName("Microsoft.CSharp")),
@@ -19,7 +19,7 @@ public class RazorEngineCompilationOptions
         public string TemplateNamespace { get; set; } = "TemplateNamespace";
         public string Inherits { get; set; } = "RazorEngineCore.RazorEngineTemplateBase";
 
-        public IList<string> DefaultUsings { get; set; } = new List<string>()
+        public HashSet<string> DefaultUsings { get; set; } = new HashSet<string>()
         {
             "System.Linq"
         };

RazorEngineCore/RazorEngineCompilationOptionsBuilder.cs

@@ -22,11 +22,6 @@ public void AddAssemblyReferenceByName(string assemblyName)
 
         public void AddAssemblyReference(Assembly assembly)
         {
-            if (this.Options.ReferencedAssemblies.Contains(assembly))
-            {
-                return;
-            }
-
             this.Options.ReferencedAssemblies.Add(assembly);
         }