AddAssign

You can build an expression tree which contains an addition assignment operation that does not have overflow checking using Expression.AddAssign method. For example, you have the following code.

int myInt;
myInt = 2;
myInt += 5;
Console.WriteLine(myInt);

Here is the code that is required to build the same functionality using expression tree.

ParameterExpression myIntVariableExpr = Expression.Variable(typeof(int), "myInt");

BlockExpression addAssignExpr = Expression.Block(
    new ParameterExpression[] { myIntVariableExpr },
    Expression.Assign(myIntVariableExpr, Expression.Constant(2)),
    Expression.AddAssign(
        myIntVariableExpr,
        Expression.Constant(5)
    )
);

Console.WriteLine(Expression.Lambda<Func<int>>(addAssignExpr).Compile()());

Try it online