在Dapper中使用SqlHierarchId抛出System.InvalidCastException

public class SqlHierarchyIdTypeHandler : SqlMapper.TypeHandler<SqlHierarchyId>
{
    public override void SetValue(IDbDataParameter parameter, SqlHierarchyId value)
    {
        parameter.Value = value.ToString();
    }

    public override SqlHierarchyId Parse(object value)
    {
        if (value is string stringValue)
        {
            return SqlHierarchyId.Parse(stringValue);
        }
        throw new ArgumentException("Invalid SqlHierarchyId value");
    }
}

SqlMapper.AddTypeHandler(new SqlHierarchyIdTypeHandler());