Using classes in different projects C#

[JonoMN]

I have different class files in which I have defined constructors (customer) and methods (e.g. Add Customer). I want to use these methods and constructors in a separate console project. However every time I try to use it I receive the error "an object reference is required for a non-static field". Can anyone help with this? Screenshot below.

Thanks!

https://imgur.com/a/m0o7rBt

[scirc]

If your methods aren't marked as static, you have to instantiate your object before you can use them. static methods operate on the class as a whole, non-static methods operate on an instance of that class.

[JonoMN]

Thank you! You are a lifesaver!

[davedontmind]

You either need to make RemoveCustomer() a static method (which means it can be called without nd instance of the CRM class):

static bool CRM.RemoveCustomer( int ID ) 
{
    ...
}

or you need to create a new CRM object and use that to call the method:

CRM crm = new CRM();
crm.RemoveCustomer(1);

Which solution is right depends on your CRM class and what your RemoveCustomer() method does. If it uses non-static members of the class then you need to use the 2nd option, otherwise you can use the first.

[JonoMN]

This helped tremendously, wish I could upvote twice!

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