Bachelor's Thesis presents both a theoretical and practical knowledge needed for .NET environment intended higher programming language compiler construction. Thesis starts with definition of a programming language and a brief historical development overview of the same. Historical overview describes the basic features, division and motives that influenced classification of programming languages. The introductory chapter discusses the purpose and requirements of designed higher level programming language that follows up the thesis. Description of that language clarifies the fundamental characteristics of the third-generation programming languages, such as structure, typed characteristics and model of execution. Chapter that displays process of defining language grammar at the same time explains the impact of linguistic theory on computer science with a brief theoretical overview of the most important linguistic theories. Upon grammar definition presentation thesis shows the process of building a language compiler through the theoretical description of the main stages in language translation and by presentation of the practical performance which was done in creation of the tool that follows this thesis. Final part of the paper gives a brief description of program instructions execution inside .NET environment. Also this section shows the usage of specialized namespaces that mentioned environment offers for construction of suitable program instructions.