How to Check if a File Exists in .NET Core Using C#.Net

In today's article will use a simple tutorial with an example to check or validate a file exists in a given path in .NET core using c#.net. Here we will use a console application to validate the file exists. By using File.Exists(Path) to validate the given path of the file is valid or file exists or not. 

Now for lets first create a new folder and add a file in it. Please check the below file location. 

Here in above code, we are having a text file in folder. Now let's check the below code. 

string folderPath = "D:\\DemoProject\\DemoFolder\\";
string fileName = "codemantra99.txt";
string finalPath = string.Format("{0}{1}", folderPath, fileName);
Console.WriteLine("Folder Path: "+folderPath);
Console.WriteLine("File Name: " + fileName);
if (File.Exists(finalPath))
{
    Console.WriteLine(string.Format("File '{0}' exists.", fileName));
}
else
{
      Console.WriteLine(string.Format("File '{0}' does not exists. ", fileName));
}

In above code I have defined two different variables first for the folder path and second one is for the file name. Now I have used string.Format(format, object) to concatenate or combine the string variables to get the complete path of the file. 

After that I have used File.Exists(Path) to validate file exists. now let's run the code to check the output. 

Here we can see that the file exists in the given location. Now lets delete the file or rename it and then validate.

Now let's execute the code to check the output.