How to check if a form is already open in C# and VB.NET
To check if a form is already open in C# and VB.NET you can use the following snippet. Sample C# Sample VB.NET
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To check if a form is already open in C# and VB.NET you can use the following snippet. Sample C# Sample VB.NET
To check if a string is a number in C# and VB.NET you can use the following snippet. Sample C# Sample VB.NET
To check if a process is running in C# and VB.NET you can use the following snippet. Sample C# Sample VB.NET
To check if internet is avaiable in C# and VB.NET you can use the following snippet. Sample C# Sample VB.NET
To check if a character is a vowel you can use the following extension method. Extension Method in C# Extension Method in VB.NET
To check if a element exists in Javascript you can use the following snippet. Sample Javascript Sample jQuery
To check if a table exists in MSSQL you can use one of these two snippets. Sample MSSQL using INFORMATION_SCHEMA Sample MSSQL using OBJECT_ID
To check if the browser supports Html5 localStorage you can use the following code snippet. Sample Javascript for more informations see W3Schools: HTML5 Web Storage
To check if a file exists using Python you can import os.path and use isfile method. Sample Python for more informations see Common pathname manipulations