// VALIDATION EVENTS
        private string InitValidation(string blockSize, string cacheSize, string sourceCode, bool IsMRU)
        {
            string err = string.Empty;

            err += ValidateInput.IsBlockCacheSize(blockSize, "Block");
            err += ValidateInput.IsBlockCacheSize(cacheSize, "Cache");
            err += ValidateInput.HasCode(sourceCode);
            //err += ValidateInput.IsReplaceAlgoSet(IsMRU);
            return(err);
        }