How do I interpolate strings?

Question

I want to do the following in C# (coming from a Python background):

strVar = "stack"
mystr  = "This is %soverflow" % (strVar)

How do I replace the token inside the string with the value outside of it?

Answer 1

string mystr = string.Format("This is {0}overflow", strVar);

And you could also use named parameters instead of indexes.