porting 7.6@5c5baca into 8

src/Umbraco.Core/Exceptions/ConnectionException.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace Umbraco.Core.Exceptions
+{
+    internal class ConnectionException : Exception
+    {
+        public ConnectionException(string message, Exception innerException) : base(message, innerException)
+        {
+            
+        }
+    }
+}

src/Umbraco.Core/Exceptions/DataOperationException.cs

@@ -7,7 +7,7 @@ namespace Umbraco.Core.Exceptions
         public T Operation { get; private set; }
 
         public DataOperationException(T operation, string message)
-            :base(message)
+            : base(message)
         {
             Operation = operation;
         }