How to translate make_pair in c++ to c#?

Question

map <pair<unsigned int, unsigned int>, unsigned int> kmapValues;

with

private Dictionary<KeyValuePair<uint, uint>, uint> kmapValues;

replace

kmapValues[make_pair(j, i)] = 1 

with

kmapValues[Tuple(j, i)] = 1 // got error

System.Tuple is type but used like a variable error

Answer 1

You are declaring a dictionary to use KeyValuePair<K,V> keys, but you are trying to access it with Tuple<T1,T2> instead. You need to decide on one type, and stay with it.

Since KeyValuePair<K,V> is asymmetric, I would use Tuple<T1,T2>:

private Dictionary<Tuple<uint, uint>, uint> kmapValues;

Then your assignment would work correctly:

kmapValues[Tuple.Create(j, i)] = 1;

Answer 2

// As a C# extension method, on some static class:

public static KeyValuePair<K, V> MakePair<K, V>(this K k, V v) { return new KeyValuePair<K, V>(k, v); }