Expression.Decrement Method (Expression)
Creates a UnaryExpression that represents the decrementing of the expression by 1.
Assembly: System.Core (in System.Core.dll)
The following code example shows how to create an expression that substracts 1 from a given value.
// Add the following directive to your file: // using System.Linq.Expressions; double num = 5.5; // This expression represents a decrement operation // that subtracts 1 from a value. Expression decrementExpr = Expression.Decrement( Expression.Constant(num) ); // Print expression. outputBlock.Text += decrementExpr.ToString() + "\n"; // The following statement first creates an expression tree, // then compiles it, and then executes it. outputBlock.Text += Expression.Lambda<Func<double>>(decrementExpr).Compile()() + "\n"; // The value of the variable did not change, // because the expression is functional. outputBlock.Text += "object: " + num + "\n"; // This code example produces the following output: // // Decrement(5.5) // 4.5 // object: 5.5
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