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c#syntaxoperators

C# syntax sugar in three conditions

I want to know syntax sugar in C#.

var name = side=="BUY" ? "LONG" : "SHORT";

->It's very simple.

But there is possibility of the value except "BUY" and "SELL" in side. The following is redundant. Please tell me the simple expression.

var name;
if (side == "BUY")
    name="LONG";
else if(side="SELL")
    name="SHORT";
else
    throw Exception();
Solution

  • Here are few shorter ways to throw Exception (all case sensitive):

    string name1 = side == "BUY" ? "LONG" : side == "SELL" ? "SHORT" : throw new Exception();

string name2 = new[] { "LONG", "SHORT" }[Array.IndexOf(new[] { "BUY", "SELL" }, side)]; // System.IndexOutOfRangeException: 'Index was outside the bounds of the array.'

string name3 = new Dictionary<string, string> { { "BUY", "LONG" }, { "SELL", "SHORT" } }[side]; // System.Collections.Generic.KeyNotFoundException: 'The given key was not present in the dictionary.'