Validate File Size In C#

In this blog, you will learn how to validate file size in c#.

To achieve this, we can use the following namespace: "System.IO". Here is a custom code snippet, where the single parameter is the filePath parameter which is for accepting file path to validate size.

public void ValidateFileSize(string filePath) {
 if (!File.Exists(filePath)) {
  //Throw error if file not found
 }
 FileInfo fileInfo = new FileInfo(filePath);
 //Validate Length
 if (fileInfo.Length / 1048 > 20) {
  //Throw error if file size is larger than your default/set size.
 }
}

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