Suppose we have a dictionary like this
Dictionary dict = new Dictionary();
dict.Add(1, "Mohan");
dict.Add(2, "Kishor");
dict.Add(3, "Pankaj");
dict.Add(4, "Jeetu");
We can initialize it as follow.
Dictionary dict = new Dictionary
{
{ 1, "Mohan" },
{ 2, "Kishor" },
{ 3, "Pankaj" },
{ 4, "Jeetu" }
};