Context context = new Context(); context.DeclareVariable("var1", typeof(int)); context.DeclareVariable("var2", typeof(string)); context.ExportType(typeof(Math)); content.ExportType(typeof(DateTime)); 

 CompiledExpression compiledExpr = new ExpressionCompiler(context).Compile("var1+=3"); 

 ExpressionEvaluator evaluator = new ExpressionEvaluator(compiledExpr); evaluator.SetVariable("var1", 5); 

 Func<int> func = evaluator.Evaluate<int>(); func(); 

"a". //return value of variable 'a' "a+1" //return value of variable 'a' + 1 - add "a-1" //return value of variable 'a' - 1 - subtract "a*2" //return value of variable 'a' * 2 - multiply "a/2" //return value of variable 'a' / 2 - divide "a % 2" //return value of variable 'a' % 2 - modulo "a << 1" //return value of variable 'a' << 1 - left-shift "a >> 1" //return value of variable 'a' >> 1 - right-shift "a & 7" //return value of variable 'a' & 1 - bitwise-and "a | 2" //return value of variable 'a' | 2 - bitwise-or "a ^ a" //return value of variable 'a' & 'a' - bitwise-xor 

"a++" //Assign value of variable 'a' with post increment expression "a--" //Assign value of variable 'a' with post decrement expression "--a" //Assign value of variable 'a' with pre decrement expression "++a" //Assign value of variable 'a' with pre increment expression "a+=1" //Assign value of variable 'a' with add expression "a-=1" //Assign value of variable 'a' with substract expression "a*=2" //Assign value of variable 'a' with multiply expression "a/=2" //Assign value of variable 'a' with divide expression "a%=2" //Assign value of variable 'a' with modulo expression "a<<=1" //Assign value of variable 'a' with left-shift expression "a>>=1" //Assign value of variable 'a' with right-shift expression "a&=7" //Assign value of variable 'a' with bitwise-and expression "a|=7" //Assign value of variable 'a' with bitwise-or expression "a^=7" //Assign value of variable 'a' with bitwise-xor expression "a=(a+7)". //Assign value of variable 'a' with a simple expression "a=(a+(Int16)7)" //Assign value of variable 'a' with a complex expression "a=Int32.MaxValue" //Assign a constant value to variable 'a'. Is also an example of Field or property access on exported type. Requires Int32 to be added to exported type 

"a < 7" //Compare < between variable 'a' and int constant "a <= 7" //Compare <= between variable 'a' and int constant "a == 6" //Compare for equality between variable 'a' and int constant "a != 6" //Compare for not equal between variable 'a' and int constant "a > 7" //Compare > between variable 'a' and int constant "a >= 7" //Compare >= between variable 'a' and int constant "a && 7" //Logical and between variable 'a' and int constant "a || 0" //Logical or between variable 'a' and int constant "true && true". //Logical and between boolean constants "true || false". //Logical or between boolean constants "a >= 7000000000" //Compare variable 'a' (int) with long constant 

"new DateTime(50000000000)" //Create a new instance of DateTime based on Ticks (long). Requires DateTime to be added to ExportedTypes in Context "a=new DateTime(50000000000)" //Create a new instance of DateTime and assign to variable 'a'. Requires DateTime to be added to ExportedTypes in Context 

"a.AddTicks((Int64)100)". //Invokes method of variable (or on Exported Type) "a=a.AddTicks((Int64)100)" //Invokes method of variable and assign value to variable 'a' "Int32.Parse(\"100\")". //Invokes method on exported type. Requires Int32 to be added to ExportedTypes in Context 

"String.Concat(obj[\"channel\"][\"item\"][0][\"title\"].ToString().Substring(0,8), suffix)" //Operates on variable 'obj' of type JObject and 'suffix' of type String "Int32.Parse(((Int32)Math.Sqrt(a * a * 1.0)).ToString()) == 5" //Operates on variable 'a' of type int