Merge pull request #251 from arthrp/master

Better wording for error message

src/BenchmarkDotNet.Core/Running/BenchmarkConverter.cs

@@ -138,7 +138,7 @@ namespace BenchmarkDotNet.Running
             while (declaringType != null)
             {
                 if (!declaringType.GetTypeInfo().IsPublic && !declaringType.GetTypeInfo().IsNestedPublic)
-                    throw new InvalidOperationException($"{methodType} method {methodInfo.Name} defined within type {declaringType.FullName} has incorrect access modifiers.\nDeclaring type must be public.");
+                    throw new InvalidOperationException($"{declaringType.FullName} containing {methodType} method {methodInfo.Name} has incorrect access modifiers.\nDeclaring type must be public.");
 
                 declaringType = declaringType.DeclaringType;
             }
@@ -150,4 +150,4 @@ namespace BenchmarkDotNet.Running
                 throw new InvalidOperationException($"{methodType} method {methodInfo.Name} is generic.\nGeneric {methodType} methods are not supported.");
         }
     }
-}
+}