.net - resolving threading conflicts in C# -

lets suppose there static variable accessed 2 threads.

public static int val = 1; 

now suppose thread 1 execute's statement this

if(val==1) {   val +=1 } 

however after check , before addition in above statement thread 2 changes value of val else.

now cause nasty error. , happening in code.

is there way thread 1 gets noticed values of val has been changed , instead of adding goes , performs check again.

specifically example, could:

var originalvalue = interlocked.compareexchange(ref val,                                      2,       //update val value                                     1);      //if val matches value if(originalvalue == 1) {     //the update occurred }