Use a combination of builder and domain-specific-language style API–Fluent Interface. The API is a little more verbose but with intellisense it’s very quick to type out and easy to understand.
public class Param
{
public string A { get; private set; }
public string B { get; private set; }
public string C { get; private set; }
public class Builder
{
private string a;
private string b;
private string c;
public Builder WithA(string value)
{
a = value;
return this;
}
public Builder WithB(string value)
{
b = value;
return this;
}
public Builder WithC(string value)
{
c = value;
return this;
}
public Param Build()
{
return new Param { A = a, B = b, C = c };
}
}
DoSomeAction(new Param.Builder()
.WithA("a")
.WithB("b")
.WithC("c")
.Build());