In Dart, you can use the plus sign (`+`) or string interpolation to concatenate two strings.

### Method 1: Using the Plus Sign (`+`)
```dart
String string1 = "Hello, ";
String string2 = "World!";
String combined = string1 + string2;
print(combined);  // Output: Hello, World!
```

### Method 2: Using String Interpolation
```dart
String string1 = "Hello, ";
String string2 = "World!";
String combined = "$string1$string2";
print(combined);  // Output: Hello, World!
```

How to Concatenate Two Strings in Dart?

Method 1: Using the Plus Sign (+)

Method 2: Using String Interpolation

Method 1: Using the Plus Sign (`+`)