Which datatype should I use in c# while SQL column is money type

 The decimal keyword indicates a 128-bit data type. Compared to floating-point types, the decimal type has more precision and a smaller range, which makes it appropriate for financial and monetary calculations.

You can use a decimal as follows:

decimal myMoney = 300.5m;

how to get total number of public properties in a class c#

 class MyClass

{  
    public string A { get; set; }
    public string B { get; set; }
    public string C { get; set; }

    public MyClass()
    {
        int count = this.GetType().GetProperties().Count();
        // or
        count = typeof(MyClass).GetProperties().Count();
    }
}

MYSQL workbench error : You are using safe update mode and you tried to update a table without a WHERE that uses a KEY column

 SET SQL_SAFE_UPDATES = 0;