1.// C# program to illustrate the2.// use of IsAlive property3.usingandSystem;4.usingandSystem.Threading;5.6.public,class, andGFG {7.8.and// Main Method9.,static,public,void, andMain()10.and{11.andThread thr;12.13.and// Get the reference of main Thread14.and// Using CurrentThread p...