FXCop violation for generic types

Question

While using IList<Dictionary<string, string>> as parameter type in method declaration FXCop violation occurs

It doesnt nest generic type IList<Dictionary<string, string>>

How can I resolve this?

Answer 1

Reason for that is:

A nested type argument is a type argument that is also a generic type. To call a member whose signature contains a nested type argument, the user must instantiate one generic type and pass this type to the constructor of a second generic type. The required procedure and syntax are complex and should be avoided.

It helps you to design a simpler interface. You have 3 cases:

• use SuppressMessage attribute
• remove the rule from ruleset
• try to fix violations change the design to remove the nested type argument

You can try:

public void Method(Dictionary<string, string> param)

and use:

var list = new IList<Dictionary<string, string>>();
list.Add(new Dictionary<string, string>{{"key1", "value1"}, {"key2", "value2"}});
list.Add(new Dictionary<string, string>{{"key11", "value11"}, {"key22", "value22"}});

foreach(var element in list)
{
    Method(element);
}