Question

What is C# analog of C snprintf()?

In C code here we use

 snprintf(buf, sizeof(buf), outfilename, frame);

What could be its exact analog?

Answer 1

StringBuilder.AppendFormat String.Format is the closest. It performs the same operation, but do note that the format strings are in a different format.

Using String.Format:

string buf = string.Format("{0}", frame);

Using StringBuilder.AppendFormat:

StringBuilder builder = new StringBuilder();
builder.AppendFormat("{0}", frame);