Sequence contains more than one matching element System.InvalidOperationException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 System.Core -2146233079 Trados Studio Studio17 17.0.3.11695 Microsoft Windows 10 Home NULL 1033 1252 USER 4.0.30319.42000 USER True 16620788 MB