Query: Explicit convert throws exception

[smitpatel]

[ConditionalTheory]
        [MemberData(nameof(IsAsyncData))]
        public virtual async Task Where_bitwise_and_integral(bool isAsync)
        {
            await AssertQuery<Gear>(
                isAsync,
                gs => gs.Where(g => ((char)g.Rank & '\x0001') == '\x0001'));
        }

Message: 
    Microsoft.Data.SqlClient.SqlException : The data types nvarchar and nvarchar are incompatible in the '&' operator.
  Stack Trace: 
    at SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
    at SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
    at TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
    at TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
    at SqlDataReader.TryConsumeMetaData()
    at SqlDataReader.get_MetaData()
    at SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
    at SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean isAsync, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
    at SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry, String method)
    at SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
    at SqlCommand.ExecuteReader(CommandBehavior behavior)
    at SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
    at DbCommand.ExecuteReader()
    at RelationalCommand.Execute(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary`2 parameterValues, IDiagnosticsLogger`1 logger) in RelationalCommand.cs line: 239
    at RelationalCommand.ExecuteReader(IRelationalConnection connection, IReadOnlyDictionary`2 parameterValues, IDiagnosticsLogger`1 logger) in RelationalCommand.cs line: 158
    at Enumerator.MoveNext() in QueryingEnumerable.cs line: 103
    at LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
    at EnumerableHelpers.ToArray[T](IEnumerable`1 source)
    at Enumerable.ToArray[TSource](IEnumerable`1 source)
    at QueryAsserter`1.AssertQuery[TItem1](Func`2 actualQuery, Func`2 expectedQuery, Func`2 elementSorter, Action`2 elementAsserter, Boolean assertOrder, Int32 entryCount, Boolean isAsync, String testMethodName) in QueryAsserter.cs line: 349
    at GearsOfWarQueryTestBase`1.Where_bitwise_and_integral(Boolean isAsync) in GearsOfWarQueryTestBase.cs line: 702
    at GearsOfWarQuerySqlServerTest.Where_bitwise_and_integral(Boolean isAsync) in GearsOfWarQuerySqlServerTest.cs line: 627
    at --- End of stack trace from previous location where exception was thrown ---