pacify C# re. BsatnRowListCount

src/SpacetimeDBClient.cs

@@ -245,6 +245,8 @@ private static int BsatnRowListCount(BsatnRowList list)
                     return list.RowsData.Length / size;
                 case RowSizeHint.RowOffsets(var offsets):
                     return offsets.Count;
+                default:
+                    throw new InvalidOperationException();
             }
         }
 
@@ -266,7 +268,7 @@ private static IEnumerable<byte[]> BsatnRowListIter(BsatnRowList list)
                         }
                     case RowSizeHint.RowOffsets(var offsets):
                         {
-                            start = offsets[index];
+                            start = (int) offsets[index];
                             // The end is either the start of the next element or the end.
                             int end;
                             if (index + 1 == count)
@@ -275,7 +277,7 @@ private static IEnumerable<byte[]> BsatnRowListIter(BsatnRowList list)
                             }
                             else
                             {
-                                end = offsets[index + 1];
+                                end = (int) offsets[index + 1];
                             }
                             elemLen = end - start;
                             yield return new ReadOnlySpan<byte>(list.RowsData, start, elemLen).ToArray();
@@ -328,7 +330,8 @@ HashSet<byte[]> GetInsertHashSet(System.Type tableType, int tableSize)
                 switch (message)
                 {
                     case ServerMessage.InitialSubscription(var initialSubscription):
-                        subscriptionInserts = new(capacity: initialSubscription.DatabaseUpdate.Tables.Sum(a => a.NumRows));
+                        ulong cap = initialSubscription.DatabaseUpdate.Tables.Select(a => a.NumRows).Sum();
+                        subscriptionInserts = new(capacity: (int) cap);
 
                         // First apply all of the state
                         foreach (var update in initialSubscription.DatabaseUpdate.Tables)
@@ -341,7 +344,7 @@ HashSet<byte[]> GetInsertHashSet(System.Type tableType, int tableSize)
                                 continue;
                             }
 
-                            var hashSet = GetInsertHashSet(table.ClientTableType, update.NumRows);
+                            var hashSet = GetInsertHashSet(table.ClientTableType, (int) update.NumRows);
 
                             foreach (var cqu in update.Updates)
                             {