Use EF and Context to send custom SQL string to database

EFContext

/// <summary>
/// Checks the Files for the specified event and category to ensure the files haven't already been generated
/// </summary>
/// <param name="eventID">Event to check for existing files</param>
/// <param name="fileCategory">Category of files to check the existence of</param>
/// <returns></returns>
public static bool FilesExist(int eventID, string fileCategory)
{
    bool filesExist = false;

    using (var db = new MyContext())
    {
        const string sql = "select 1 from TABLENAME where EventID = @EventID and Category = @Category";

        SqlParameter eventIDParam = new SqlParameter("@EventID", eventID);
        SqlParameter categoryParam = new SqlParameter("@Category", fileCategory);

        filesExist = db.Database.SqlQuery<Int32>(sql, new object[] { eventIDParam, categoryParam }).Any();
    }

    return filesExist;
}