Member 'string.Format(string, params object[])' cannot be accessed with an instance reference; qualify it with a type name instead

asp.net, asp.net-mvc, c#

Solution

You're misunderstanding strings.

`String.Format()` is a static method that takes a format string and a set of parameters. You could call

String.Format("{0:c}", someDecimal);

However, if you only have a single value, you can call `ToString()` with a format parameter:

someDecimal.ToString("c")

Problem

I have a page that displays a list of contracts. Each row contains an Amount, a Fee, and a Total that I'm calculating row that row. I'm also trying to calculate a grand total, that sums up Total from the collection. Here's what I have: ``` var contracts = _contractsRepository.Contracts. Select(c => new ContractViewModel { ContractId = c.ContractID, Amount = c.Amount, Fee = c.Fee, Total = c.Sum(cc => cc.Amount) + c.Sum(cc => cc.AdminFee) }); // error here ViewBag.GrandTotal = contracts.Sum(c => c.Total).ToString().Format("{0:c}"); ``` I get a compilation error when I try to calculate the grand total that says: Member 'string.Format(string, params object[])' cannot be accessed with an instance reference; qualify it with a type name instead Anyone know what I can do to fix this?

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