I ran into a similar issue (using VS2013 and Resharper 8.2).
To stop the undesirable auto-completion on every “space” hit, I had to disable IntelliSense completion on “space” both within VS and R# options:
- VS > Tools > Options > Text Editor > C# > IntelliSense >
“Committed by pressing the space bar” checkbox - VS > Resharper > Options > Environment > IntelliSense > Completing Characters > C# “Complete on space” checkbox
Cheers!