Let's say I have this variable in my C# Code
string longVariableStuff = "hsduifgnw8e7rty83rfgediguidogy7834rghf7834ghf170934hf7034hgf734gf8170g437fg73408g1f784g1387fg4731gf7g13fg18347gf78134gf7834gf780134gfuhsdjkfhsdjkafhldsj";
Sure, you can just break it up:
string longVariableStuff = "hsduifgnw8e7rty83rfgediguidogy7834rghf7834ghf170934hf7034hgf7" + "34gf8170g437fg73408g1f784g1387fg4731gf7g13fg18347gf78134gf783" + "4gf780134gfuhsdjkfhsdjkafhldsj";
This incurs absolutely no performance penalty, because the strings will be concatenated back into one string at compile time.