These are the basic data types in C# and their range:
| Keyword | Class | Range |
| bool | System.Boolean | true and false |
| byte | System.Byte | 0 to 255 |
| sbyte | System.SByte | -128 to 127 |
| short | System.Int16 | -32768 to 32767 |
| ushort | System.Uint16 | 0 to 65535 |
| int | System.Int32 | -2,147,483,648 to 2,147,483,647 |
| uint | System.UInt32 | 0 to 4,294,967,295 |
| long | System.Int64 | -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 |
| ulong | System.UInt64 | 0 to 18,446,744,073,709,551,615 |
| decimal | System.Decimal | -79,228,162,514,264,337,593,543,950,335 to 79,228,162,514,264,337,593,543,950,335 |
| double | System.Double | -1.79769313486232e308 to 1.79769313486232e308 |
| float | System.Single | -3.402823e38 to 3.402823e38 |
| char | System.Char | 0 to 65535 |
