public string CategoryInsert(CategoryModel categoryModel)
        {
            string temp = String.Empty;
            int    ik   = 0;

            for (int i = 0; i < categoryModel.Category_Name.Length; i++)
            {
                if (categoryModel.Category_Name[i] == ' ' && ik == 0)
                {
                    continue;
                }
                else if ((categoryModel.Category_Name[i] >= 'a' && categoryModel.Category_Name[i] <= 'z') ||
                         (categoryModel.Category_Name[i] >= 'A' && categoryModel.Category_Name[i] <= 'Z') ||
                         (categoryModel.Category_Name[i] == ' ' && ik == 1))
                {
                    temp += categoryModel.Category_Name[i];
                    ik    = 1;
                }
            }
            categoryModel.Category_Name = temp;
            if (categoryModel.Category_Name == String.Empty)
            {
                return("Sorry, You Cannot Enter Blank Category");
            }
            bool isCategoryExist = categoryGateway.IsCategoryExists(categoryModel.Category_Name);

            if (isCategoryExist)
            {
                return("Category Name Already Exists");
            }
            else
            {
                int result = categoryGateway.CategoryInsert(categoryModel);

                if (result > 0)
                {
                    return("Category Name Insert Successful");
                }
                else
                {
                    return("Category Name Insert Failed");
                }
            }
        }