Technique to create new var foo=new{bar = "Hohoho"}

I am new to the c# language and questions came up. i use the massive single file DB.

here you can create a class like this:

public class products : DynamicModel 
{
    public products(String conn) : base("northwind", "products","productid") 
    {
    }
}

now would i do sth like this:

var products = new { Productname = "HOHOHO" };

until here everything works fine, but i want to query and update different databases and tables and so i dont know that there is a table column like "Productname" so this must be a variable:

string foo = "Productname";
var products = new { foo = "HOHOHO" };

But this would leed to the fact that the massive looks for a column "foo" because the string would not be interpreted.

How can I insert a variable here?

How is this technique named?

thanks for your help!

EDIT:

Thanks to TGH!

In combination with the massive DB the use of an NameValueCollection would solve the problem:

NameValueCollection nvc = new NameValueCollection();
nvc.Add(field, (string)fieldValue);
table.Update(nvc, keyValue);

Thank you

Solution

You can't use variables when defining properties on your anonymous objects. I would recommend that you look into a Dictionary<string,string> to represent this instead. A Dictionary/Hashtable is probably the most flexible way to get around the static nature of c# when it comes to dynamic variables

You can let each column name be the keys in the dictionary