C# Read a string with a particular format : I have some strings like 

string text = "these all are strings, 000_00_0 and more strings are there I have here 649_17_8, and more with this format 975_63_7."

So here I wanted to read only 000_00_0, 649_17_8, 975_64_7....   All the string with this format

Please help me with the situation

Thanks in advance